Non-arc-resistant, metal-clad, medium-voltage switchgear instruction manual

100 Pages·2017·11.53 MB·English

E50001-F710-A230-V3-4A00
GM-SG
Non-arc-resistant, metal-clad,
medium-voltage switchgear
instruction manual
usa.siemens.com/mvswitchgear
GM-SG Medium-Voltage Switchgear | Instruction Manual
Hazardous voltages and high speed moving parts.
Will cause death, serious injury or property damage.
Always de-energize and ground the equipment before maintenance. Read
and understand this instruction manual before using equipment.
Maintenance should be performed only by qualified personnel. The use of
unauthorized parts in the repair of the equipment or tampering by
unqualified personnel will result in dangerous conditions that will cause
death, severe injury or equipment damage. Follow all safety instructions
contained herein.
Important Further, a qualified person shall also be familiar with the
The information contained herein is general in nature and proper use of special precautionary techniques, personal
not intended for specific application purposes. It does not protective equipment, insulation and shielding materials,
relieve the user of responsibility to use sound practices in and insulated tools and test equipment. Such persons are
application, installation, operation, and maintenance of the permitted to work within limited approach of exposed live
equipment purchased. Siemens reserves the right to make parts operative at 50 volts or more, and shall, at a minimum,
changes in the specifications shown herein or to make be additionally trained in all of the following:
improvements at any time without notice or obligation.
The skills and techniques necessary to distinguish
Should a conflict arise between the general information
exposed energized parts from other parts of electric
contained in this publication and the contents of drawings or
equipment.
supplementary material or both, the latter shall take
precedence. The skills and techniques necessary to determine the
nominal voltage of exposed live parts.
Qualified person
For the purpose of this instruction manual a qualified The approach distances specified in NFPA 70E® and the
person is one who has demonstrated skills and knowledge corresponding voltages to which the qualified person will
related to the installation, construction, and operation of the be exposed.
equipment and the hazards involved. In addition, this person
The decision-making process necessary to determine the
has the following qualifications:
degree and extent of the hazard and the personal
Is trained and authorized to de-energize, clear, ground protective equipment and job planning necessary to
and tag circuits and equipment in accordance with perform the task safely.
established safety procedures.
Is trained in the proper care and use of protective
equipment, such as: rubber gloves, hard hat, safety
glasses or face shields, flash clothing, etc. in accordance
with established safety practices.
Is trained in rendering first aid.
2
Instruction Manual | GM-SG Medium-Voltage Switchgear
Instruction manual
Introduction 04 - 05
General description 06 - 07
Receiving, handling, and storage 08 - 14
Installation 15 - 49
Electrical connections 50 - 63
Instrument transformers 64 - 70
Circuit breaker positions 71 - 82
Inspection and testing 83 - 84
Maintenance 85 - 89
Accessories 90 - 93
Annex 94 - 99
3
GM-SG Medium-Voltage Switchgear | Instruction Manual
Introduction
Hazardous voltages and high speed moving parts.
Will cause death, serious injury or property damage.
To avoid electrical shock, burns and entanglement in moving parts, this
equipment must be installed, operated and maintained only by qualified
persons thoroughly familiar with the equipment, instruction manuals and
drawings. Read and understand this instruction manual before using
equipment.
Introduction Note: This instruction manual includes
The type GM-SG switchgear is designed to description of the process of racking a
meet all applicable ANSI, NEMA and IEEE circuit breaker (or ground and test device)
standards. within the circuit breaker compartment
using the manual racking crank (see text
Successful application and operation of this
starting on page 72), and in the Annex
equipment depends as much upon proper
(starting on page 94), using the portable
installation and maintenance by the user as
electrical-racking accessory. The switchgear
it does upon the proper design and
is also available with built-in electrical-
fabrication by Siemens.
racking in the circuit breaker compartment,
This equipment is not classified as arc- using the Siemens integrated electrical-
resistant switchgear and has not been racking system (SIERS), and instruction
tested for resistance to internal arcing in manual EMMS-T40013-XX-XXXX should be
accordance with ANSI/IEEE C37.20.7. consulted.
The purpose of this instruction manual is to This instruction manual does not apply to
assist the user in developing safe and medium-voltage (NEMA class E2)
efficient procedures for the installation, controllers, which may be provided in the
maintenance and use of the equipment. same overall assembly. If the equipment
includes controllers, consult the instruction
This instruction manual applies to the
manual applicable to the controllers.
switchgear structures. Refer to instruction
manual E50001-F710-A231-X-XXXX for Contact the nearest Siemens representative
instructions applicable to the type GMSG if any additional information is desired.
circuit breakers.
4
Instruction Manual | GM-SG Medium-Voltage Switchgear
Signal words Field service operation and warranty
The signal words "danger," "warning," and issues
"caution" used in this instruction manual Siemens can provide competent, well
indicate the degree of hazard that may be trained field service representatives to
encountered by the user. These words are provide technical guidance and advisory
defined as: assistance for the installation, overhaul,
repair and maintenance of Siemens
Danger - Indicates an imminently hazardous
equipment, processes and systems. Contact
situation which, if not avoided, will result in
regional service centers, sales offices or the
death or serious injury.
factory for details, or telephone Siemens
Warning - Indicates a potentially hazardous field service at 1-800-333-7421 or 1-423-
situation which, if not avoided, could result 262-5700 outside the U.S.
in death or serious injury.
For medium voltage customer service
Caution - Indicates a potentially hazardous issues, contact Siemens at 1-800-333-7421
situation which, if not avoided, may result or 1-423-262-5700 outside the U.S.
in minor or moderate injury.
Notice (without safety alert symbol) -
Indicates a potentially hazardous situation
which, if not avoided, may result in property
damage.
5
GM-SG Medium-Voltage Switchgear | Instruction Manual
General description
The instructions included in this instruction
manual are provided to aid you in obtaining
longer and more economical service from
your Siemens switchgear. For proper
installation and operation, this information
should be distributed to your operators and
engineers.
By carefully following these instructions,
difficulties should be avoided. However,
these instructions are not intended to cover
all details of variations that may be
encountered in connection with the
installation, operation and maintenance of
this equipment.
Should additional information be desired,
including replacement instruction manuals,
contact your local Siemens representative.
Scope
These instructions cover the installation,
operation and maintenance of Siemens type
GM-SG metal-clad switchgear assemblies
using horizontal drawout type GMSG
vacuum circuit breakers. The equipment
designs described in this instruction manual
Figure 1: Typical indoor type GM-SG metal-clad switchgear include indoor, Shelter-Clad and Shelter-
Clad+ walk-in aisle outdoor and non-walk-in
outdoor configurations for applications up
to 15 kV. A typical indoor switchgear
Introduction
assembly is shown in Figure 1: Typical
Siemens type GM-SG metal-clad switchgear
indoor type GM-SG metal-clad switchgear.
is precision built equipment designed to
All diagrams, descriptions and instructions
function efficiently under normal operating
apply to all of the above classes and designs
conditions. It is designed and manufactured
unless noted otherwise.
to operate within the parameters
established in ANSI/IEEE C37 standards for Standard construction details of the
metal-clad switchgear. Performance switchgear, auxiliary equipment and
requirements of these standards have been necessary accessories are given in the
met or exceeded by these designs. Specific appropriate sections. Special mechanical
standards which apply include ANSI/IEEE and electrical devices, furnished in
C37.20.2. accordance with purchase order
requirements, are covered by supplementary
This equipment is not classified as arc-
instructions submitted with this instruction
resistant switchgear and has not been
manual.The equipment furnished has been
tested for resistance to internal arcing in
designed to operate in a system having the
accordance with ANSI/IEEE C37.20.7.
circuit capacity specified by the purchaser.
6
Instruction Manual | GM-SG Medium-Voltage Switchgear
If for any reason the equipment is used in a Generally, when the primary compartment
Design Type
different system or if the short-circuit does not contain primary circuit elements
capacity of the system is increased, the (circuit breakers or interior auxiliary Indoor GM-SG
ratings of the equipment, including the equipment) but instead contains only
Shelter-Clad
momentary rating of the switchgear, the secondary control equipment, those front
single-aisle SGM-SG
interrupting capacity of the circuit breakers panels may also be used for these items and outdoor
and the bus capacity must be checked. may also be opened to access secondary
Shelter-Clad+
Failure on the part of the user to receive control equipment.
single-aisle S+GM-SG
approval of intended changes from Siemens outdoor
Shelter-Clad outdoor equipment consists of
may cause the warranty to be void.
indoor equipment enclosed in a weather- Non-walk-in
OGM-SG
outdoor
This instruction manual applies to the resistant housing complete with an
switchgear structures. Refer to instruction illuminated, walk-in aisle. Circuit breakers can
manual E50001-F710-A231-X-XXXX for be moved inside the aisle and control devices Table 1: Switchgear designation
instructions applicable to the type checked without exposure to the outside
GMSG vacuum circuit breakers. elements.
Note: This instruction manual does not apply Shelter-Clad+ outdoor equipment consists of
to medium-voltage (NEMA class E2) indoor equipment enclosed in a weather-
controllers, which may be provided in the resistant housing complete with a walk-in
same overall assembly. If the equipment aisle, a common base, and many optional
includes controllers, consult the instruction features typically only available in power
manual applicable to the controllers.
equipment centers (PECs), such as HVAC
General description systems, indoor and outdoor lighting,
The switchgear described in this instruction insulation, work spaces, and alarm systems.
manual is of the metal-clad type, as defined Shelter-Clad+ switchgear assemblies are built
in ANSI/IEEE C37.20.2. All parts are in partnership with Siemens-qualified
completely enclosed within grounded vendors, who provide detailed drawings of
barriers, the secondary control devices and each custom assembly which include lifting,
primary circuits are isolated from each other handling, support, and installation
by shutters or barriers, and the primary bus instructions. Please be sure to carefully review
joints are completely covered with insulation and follow all instructions provided in the
materials to suit the voltage class of the order-specific Shelter-Clad+ drawing package.
equipment.
Non-walk-in outdoor switchgear consists of
Siemens switchgear carries a type designation indoor switchgear enclosed in a weatherproof
or class, as shown in Table 1: Switchgear housing complete with a gasketed door over
designation. These designations may appear the inner front panels. Circuit breakers can be
on drawings and familiarity with them will moved outside of the cubicles with the use of
simplify communications with the factory. a lift truck or similar handling device. Non-
walk-in outdoor equipment is used where it is
Indoor equipment is arranged with upper and
felt that an enclosed service aisle is
lower primary compartments and a center
unnecessary, or space does not permit its use.
secondary compartment in the front of the
equipment. Primary compartments contain
either a drawout circuit breaker or interior
auxiliary equipment, such as voltage or
control power transformers, located behind a
front panel. The front panel of the secondary
compartment can be used for protective
relays, instruments and similar devices and
may be opened to provide access to
secondary control equipment.
7
GM-SG Medium-Voltage Switchgear | Instruction Manual
Receiving, handling
and storage
Receiving Inspection and unpacking
Each group of type GM-SG metal-clad Inspect the equipment as soon as possible
switchgear is securely blocked and braced after receipt for any damage that may have
for shipment. It is crated, boxed or covered occurred in transit. Before unpacking,
as required by shipping conditions. If special examine the package itself, as a damaged
handling is required, it is so indicated. package may indicate damage to the
Relatively delicate instruments, protective contents of the package. Be careful when
relays and other devices are included, and unpacking equipment. The use of sledge
the switchgear assembly must be handled hammers and crowbars may damage the
carefully when unloading. finish, or the equipment itself. Use nail
pullers. After unpacking, examine
Normally, the switchgear is shipped with the
equipment for any possible damage. Check
associated type GMSG vacuum circuit
the shipping manifest to be certain that all
breakers installed in their respective units, in
items have been received. If there is a
the CONNECT position. Refer to instruction
shortage, make certain it is noted on the
manual E50001-F710-A231-X-XXXX for
freight bill and contact the carrier
information concerning the type GMSG
immediately. Notify Siemens medium-
circuit breakers.
voltage customer service at 1-800-333-7421
Identification (1-423-262-5700 outside the U.S.) of any
When the shipment includes more than one shortage or damage.
shipping group or equipment for more than
Shipping damage claims
one substation, marking tags are attached
Important: The manner in which visible
to each crate or package for identification.
shipping damage is identified by consignee
The drawing number on the tag is also on
prior to signing the delivery receipt can
the shipping list. The shipping list identifies
determine the outcome of any damage
the contents with the unit numbers included
claim to be filed.
in the shipping group. Refer to the general
arrangement drawing for the location of Notification to carrier within 15 days for
each unit within the group lineup. Use this concealed damage is essential if loss
information to simplify the assembly resulting from unsettled claims is to be
operation and save unnecessary handling. eliminated or minimized.
1. When shipment arrives, note whether
equipment is properly protected from
the elements. Note trailer number on
which the equipment arrived. Note
blocking of equipment. During unloading,
make sure to count the actual items
unloaded to verify the contents as
shown on the delivery receipt.
8
Instruction Manual | GM-SG Medium-Voltage Switchgear
2. Make immediate inspection for visible 6. Be sure equipment is properly protected
damage upon arrival and prior to from any further damage by covering it
disturbing or removing packaging or properly after unloading.
wrapping material. This should be done
7. If practical, make further inspection for
prior to unloading when possible. When
possible concealed damage while the
total inspection cannot be made on
carrier’s inspector is on site. If inspection
vehicle prior to unloading, close
for concealed damage is not practical at
inspection during unloading must be
the time the carrier’s inspector is
performed and visible damage noted on
present, it must be done within 15 days
the delivery receipt. Take pictures
of receipt of equipment. If concealed
if possible.
damage is found, the carrier must again
3. Any visible damage must be noted on be notified and inspection made prior to
the delivery receipt and acknowledged taking any corrective action to repair.
with the driver’s signature. The damage Also notify Siemens immediately at 1-800-
should be detailed as much as possible. 333-7421 or 1-423-262-5700 outside
It is essential that a notation "possible the U.S.
internal damage, subject to inspection"
8. Obtain the original of the carrier
be included on delivery receipt. If the
inspection report and forward it along
driver will not sign the delivery receipt
with a copy of the noted delivery receipt
with damage noted, the shipment
to Siemens at 1-800-333-7421 or 1-423-
should not be signed for by the
262-5700 outside the U.S. Approval
consignee or their agent.
must be obtained by Siemens from the
4. Notify Siemens immediately of any carrier before any repair work can be
damage, at 1-800-333-7421 or performed. Before approval can be
1-423-262-5700 outside the U.S. obtained, Siemens must have the above
referenced documents. The carrier
5. Arrange for a carrier inspection of
inspection report and/or driver’s
damage immediately.
signature on the delivery receipt does
Important: Do not move equipment from not constitute approval to repair.
the place it was set when unloading. Also,
Note: Shipments are not released from the
do not remove or disturb packaging or
factory without a clear bill of lading.
wrapping material prior to carrier damage
Approved methods are employed for
inspection. Equipment must be inspected by
preparation, loading, blocking and tarping
carrier prior to handling after receipt. This
of the equipment before it leaves the
eliminates loss due to claims by carrier that
Siemens factory. Any determination as to
equipment was damaged or further
whether the equipment was properly loaded
damaged on site after unloading.
or properly prepared by shipper for over-the-
road travel cannot be made at the
destination. If the equipment is received in a
damaged condition, this damage to the
equipment must have occurred while en
route due to conditions beyond Siemens‘
control. If the procedure outlined above is
not followed by the consignee, purchaser or
their agent, Siemens is not held liable for
repairs. Siemens is not held liable for repairs
in any case where repair work was
performed prior to authorization from
Siemens.
9
GM-SG Medium-Voltage Switchgear | Instruction Manual
Item Description Lifting and moving
A Lifting plate There are a number of methods that can be
used in handling the switchgear that, when
B Spreader beams
C properly employed, will not damage the
A
C Lift cable
B switchgear sections. The handling method
used will be determined by conditions and
A B
available equipment at the installation site.
Lifting with a crane is the preferred method
of handling; however, overhead
obstructions or low ceilings often dictate
that other methods must be used. Rollers,
jacks or forklift trucks may be used prior to
removal of wooden skids.
Each group of switchgear has provisions for
attaching lifting equipment. Though the lift
points vary in location on indoor, Shelter-
Clad outdoor and non-walk-in designs, all
5.0 26.0 5.0 are designed for use with a crane of
(127) (660) (127) adequate height and capacity. To estimate
the maximum required crane capacity,
Lifting points
multiply the number of sections to be lifted
One unit
by 5,300 lbs (2,400 kg). A drawing pocket
5.0 (127) 62.0 (1,575) 5.0 (127) (or holder) is provided on each lineup of
switchgear. This drawing pocket includes a
Lifting points Ø1.25 typical
general arrangement drawing of the
Two units
switchgear lineup, plus a drawing with
36.0 (914) 36.0 (914) 36.0 (914) installation and handling instructions for the
equipment. The drawing pocket is normally
Lifting points
located at the left end of the lineup. Review
Three units
this information carefully before moving the
36.0 (914) 72.0 (1,829) 36.0 (914) equipment.
Lifting points For Shelter-Clad+ switchgear, please refer to
Four units the general arrangement drawing and
Left end of shipping group drawing with installation and handling
instructions for the equipment as the
101.14 (2,569)
equipment sizes and weights vary
27.85 (707) 43.48 (1,104)
depending upon the specific design of the
Side view
Lifting points outdoor enclosure and the options included
in the specific order.
Front of shipping group
Figure 2: Lifting indoor switchgear
with crane
Heavy weight.
Can result in death, serious injury or property damage.
Observe all handling instructions in this instruction manual to prevent
tipping or dropping of equipment.
10