Areva MiCOM P220, P225 and P226C - Motor and Overcurrent Protection Relays. Short Technical Description

8 Pages·0.191 MB·English

PROTECTION
MiCOM P220, P225
and P226C
MOTOR PROTECTION RELAY
MOTOR AND OVERCURRENT PROTECTION RELAY
The MiCOM P22x protection relay range is
designed for motor protection applications. A
complete set of protection functions is performed
on the measurement of current, voltage* and
temperature*. In addition to these basic functions,
the relay carries out a large number of other
MiCOM
functions that enable it to protect and run the motor
P220
more effectively.
The reliability of the system is further enhanced via
checks on bus voltage prior to start-up, supervision
of trip-circuit wiring continuity and protection
against circuit-breaker failure.
MiCOMP225
The MiCOM P22x protection relay range is
particularly adapted to Oil refinery, chemical plant,
metallurgy, glass and cement manufacturing, paper
mills, electrical and mechanical engineering, food
production, mining etc. It is also suitable for water
treatment and in pumping stations as well as in
steam power plants.
On top of that high inertia loads and anti-backspin
protection ensures that the rotor stops before the
motor can be re-started.
MiCOMP226C
For motors whose current supply contains a
considerable degree of distortion, the relay
provides a true RMS base thermal image allowing
efficient protection against overload phenomena
due to the presence of harmonic components.
Customer Benefits The addition of power measurement* and energy
• Provide comprehensive metering*, and the presence of analogue outputs*
protection functions for a
(current loop) make the MiCOM P22x protection
large range of applications.
relay range a highly competitive and effective
(cid:127)Optimize the installation cost.
(cid:127)Improve monitoring conditions. equipment in terms of protection.
(cid:127)Offer rack and compact design.
(cid:127)Reduce the need of documents * on some models only
and trainings.
(cid:127)Save time on day-to-day use.
AREVA T&D
APPLICATION Compact and "Plug and play" made, the P22x
protection relay range supply essential functions for
The MiCOM P22x protection relay range performs and industry applications, where the following requirements
offers a numerous functions in a compact design: must be achieved:
> Protection > Small and medium motors
> Monitoring > High inertia
> Diagnosis > Compact case model
> Fault analysis tools > Easy to use
> Aid to maintenance > Low cost
MAIN FUNCTIONS
Protection functions are autonomous and can be
individually configured or disabled to suit a particular
application.
PROTECTION FUNCTIONS P220 P225 P226C
• (cid:127) (cid:127)
50/51 Short circuit
(cid:127) (cid:127) (cid:127)
50N/51N Earth fault
(cid:127)
48/49/49LR/50S/66 Second motor protection mode
(cid:127) (cid:127)
50BF Breaker Failure
(cid:127) (cid:127) (cid:127)
66 Number of starts limitation
(cid:127) (cid:127) (cid:127)
37 Loss of load / Underpower
(cid:127) (cid:127) (cid:127)
46 Negative Sequence Overcurrent
(cid:127) (cid:127) (cid:127)
49 Thermal Overload
(cid:127) (cid:127)
27/27LV/59 Undervoltage / Overvoltage / Re-acceleration
(cid:127) (cid:127) (cid:127)
86 Latching of output relay
(cid:127) (cid:127) (cid:127)
48/ 51LR Start / Stalled protection / Motor Re-acceleration
(cid:127) (cid:127)
51S Locked rotor during start-up
(cid:127) (cid:127) (cid:127)
14 Speed switch input
26 Optional RTD inputs 6 10
CONTROL AND MONITORING P220 P225 P226C
(cid:127) (cid:127)
Emergency Restart
(cid:127) (cid:127) (cid:127)
Programmable Scheme Logic (4 basic equations)
(cid:127) (cid:127) (cid:127)
CB Control & Monitoring
(cid:127) (cid:127)
Trip Circuit Supervision
Setting Groups 2 2 2
MEASUREMENTS & RECORDS P220 P225 P226C
(cid:127) (cid:127) (cid:127)
Measurements
(cid:127) (cid:127)
Power and Energy Measurements
Disturbance Records up to number x 2.5 sec (backed-up) 5 5 8
Fault Records (backed-up) 5 5 5
Event Logging (backed-up) 75 75 75
COMMUNICATION P220 P225 P226C
(cid:127) (cid:127) (cid:127)
Front port (RS232)
(cid:127) (cid:127) (cid:127)
Rear port (RS485) (* option) *
(cid:127)
Rear port (RS485 or optical fibre) (option)
REAR PORT PROTOCOL P220 P225 P226C
(cid:127) (cid:127) (cid:127)
Modbus RTU
(cid:127) (cid:127) (cid:127)
IEC 60870-5-103
(cid:127) (cid:127)
Kbus-Courier
HARDWARE P220 P225 P226C
Logic inputs (* option) 5 6 2/7*
Outputs relays 6 6 8
1/5 dual rated AC Current inputs (* settable) 4 4 4*
100 V AC Voltage inputs 1 1
Function keys 4
2>3
FUNCTIONAL OVERVIEW
AUXILIARY FUNCTIONS MEASUREMENTS Recording
FRONT REAR Features
PORT PORT CCBB MLoocnaitl/oRreinmgote PDhiraescet acnudrr eInnvtesrse currents Fault Record
Local (RS232) Remote (RS485) SPreolfg Mraomnmitoarbinleg AND Logic RPeeaskid cuuarl rceunrtr veanltue 5
setting MIEoCd 6B0u8s7 0R-T5U-1 03* PUhnabsaela tnoc pehase voltage Event 7R5ecording
Kbus - Courier Frequency
AAccttiivvee//rreeaaccttiivvee PEonweregries Dist. Recording
Power factor 2.5 Sec
50N 51N
I earth
50BF
50 51 46 37 48 49 51LR 51S
I
V
D igital Opto Inputs
27 59 27LV
5 6
14
(Rot. Speed ) Analogue Output(s)
Motor
1 2
26
(RTD)
Always available
Conventional Protection Relays P220 and P 225
signalling optiona l P225 Only
AUXILIARY FUNCTIONS MEASUREMENTS Recording
FRONT REAR Features
PORT PORT CCBB MLoocnaitl/oRreinmgote PDhiraescet acnudrr eInnvtesrse currents Fault Record
Locasle (tRtinSg232) RoMreo omdpBottuiecs a( lRR fTSibU4 r8e5) SPFureonlfg cMrtaioomnnmi tKoaerbyinlseg AND Logic RPPUehneaasbksiad elcua utanorlc rcpeeuhnratr sveean ltvuoeltage Event 7R55ecording
IEC 60870-5-103* Frequency
AAccttiivvee//rreeaaccttiivvee EPonewregries Dist. Recording
Power factor 2.5 Sec
50N 51N
I earth
48 / 49 / 49LR / 50S / 66
50BF
50 51 46 37 48 49 51LR 51S
I
V
Digital Opto Inputs
27 59 27LV
2 7

14 Function Keys
Motor (Rot. Speed) (4)
Conventional
Always available
signalling Protection Relay P226C
optional
PROTECTION FUNCTIONS > Loss of load (37)
> Short-circuit (50/51) Loss of load, caused by shaft rupture or the unpriming
of a pump, is detected by a timed minimum phase
A phase overcurrent element allows for the detection of current threshold.This function can be deactivated
faults between phases.In addition to this short-circuit during the start-up phase so that the motor can
threshold, a time-delayed signal and an instantaneous gradually increase its load.
signal are available to provide better selectivity.In the
P226C relay three stages are available. > Unbalance,loss of phase and single phasing
(46)
> Earth fault (50N/51N) Two overcurrent elements based on the negative
sequence component of current are available.One is
Two elements are available.Each threshold has associated with an IDMT characteristic, while the other
instantaneous and delayed signal at its disposal.The has a definite time characteristic.The two elements
adjustment range for earth current threshold varies make it possible to differentiate between a short or low
from 0.002 to 1 Ion, allowing maximum sensitivity for amplitude unbalance and a more marked phenomenon
earth fault detection.The relay's earth current input can such as loss of phase or single phasing.
be wired to a core balanced CT or to the summation of
the three-phase CTs. > Thermal overload (49) - True RMS base
The thermal image of the MiCOM P22x relay allows for
> Second motor protection mode simultaneous protection of the rotor and stator
(48/49/49LR/50S/66) windings of the motor, whatever the operating
conditions of the machine, under and overload
For applications involving directly switched induction operating conditions, during start-up, with rotor locked
motors with thermally critical rotors a separate set of or with the motor off.
"specific motor protection" functions have been made
available.These functions monitor the current Classic I t thermal images afford protection to stator
2
magnitude to establish the operating mode of the windings but do not take account of overheating in the
motor. rotor during a current unbalance.Similarly, the
presence of harmonic current components causes
> CB failure (50BF) additional overheating of the stator windings.In order
to take this overheating properly into account, the
The CB failure on fault will be detected very quickly by P22x relay separates the negative sequence current
the P225/P226C relays, which will then either send a and reconstitutes it with the true RMS value of the
new local tripping signal or act directly on the stator currents absorbed by the motor.The result is
immediately upstream CB. better protection against overloads and hence a
By speeding up the time taken to clear the fault in the marked decrease in the risk of motor damage.
case of CB failure, the P225/P226C relays help An alarm threshold, tripping threshold and thermal
maintain the stability of the network and the reliability of threshold, beyond which the motor cannot be re-
the protection system. started, are available.
> Limitation of the number of starts, As an option, RTDs can be connected to the MiCOM
time between starts (66) P220/P225 relays to monitor the motor's temperature.
For each of the RTD channels, two temperature
thresholds with individual time-delay settings are
The number of motor start-ups can be limited.The
available.It is therefore possible to monitor stator
P22x relay can discriminate between a warm and a
windings separately, as well as the spin bearings of the
cold motor, making it possible to optimise the number of
motor and the load involved.If the motor is equipped
start-ups allocated to a particular motor over a given
with thermistors, the P220/P225 relays monitor
period of time.Setting a minimum delay between two
temperature via its three thermistor inputs.
start-ups avoids exposing the motor and its start-up
system to over-large resultant stresses.
Rapide and selective clearance
of motor faults
4>5
> Undervoltage (27) / Overvoltage (59) / > Presence of bus voltage prior to start-up
Re-acceleration authorisation (27 LV)
Prior to starting the motor, the P225/P226C relays
If voltage supply drops or is lost completely, a phase- check that voltage levels are sufficiently high before
to-phase under voltage threshold causes the motor to authorising the start-up sequence.
stop.This function on P225/P226C relays can be
selectively put into or out of operation during the motor > Emergency start-up
start-up phase.An over-voltage threshold protects
against over-voltage and also give warning of ageing When required by safety conditions or by the process,
insulators. a logical input of the P22x relay can be used to allow
The relay can detect voltage sag via its voltage input. motor start-up.All start-up restrictions will then be
Depending on the duration of the voltage sag, the inhibited and the thermal image function will be
P225/P226C relays can authorise a re-acceleration of disabled.
the motor when full voltage returns or, on the other
hand, stop the motor to let the motors most critical to
the process re-accelerate. CONTROL FUNCTIONS
> Latching of output relays (86) > Independent protection setting groups
The trip order can be maintained to avoid the risk of By virtue of its two setting groups, the MiCOM P22x
re-starting on an electrical, mechanical or thermal relay allows for the protection of dual-speed motors as
fault. well as motors operating under environmental or
operational conditions, which are not constant over
> Excessive start time (48) / Locked rotor time.A change of setting group can be useful following
while running or at start-up (51LR) a change in source impedance.The result is improved
selectivity.
Whether the motor is unloaded or coupled to a heavy
> Programmable scheme logic (4 basic equations)
load, this function monitors the duration of the motor
start-up phase.
The choice of the motor's start-up detection criteria MiCOM P22x can achieve up to 4 AND logical gates
makes it possible to use this function, whatever the linked to time delays, by combining internal and
motor's start-up mode:eg, direct-on-line, star-delta, external information with the protection relay.The user
auto-transformer, resistor insertion, etc. can also create OR gates by individually programming
During normal motor operation, an overcurrent each output relay.The logical gates help make
threshold detects rotor stalling. economies on external relaying and make the relay
interactive with the process.
> Locked rotor while running or at start-up (51S)
> Trip circuit supervision
During motor start-up, a locked rotor is detected with
the help of a speed switch input on P225/P226C Supervision of wiring continuity in the trip circuit makes
relays. the system more reliable.The relay can detect a break
in the circuit, whether the CB is on or off.
> Anti-backspin
> CB monitoring
If a motor with a high inertia load, for example a fan, is
stopped, the shaft continues to rotate for some time
Preventive CB maintenance is provided by monitoring
before the rotor stops completely.If the motor is
summated contact breaking duty, the number of
switched back on while the rotor is still turning,
switching operations and the opening time.If a pre-set
something akin to a false coupling may occur, causing
threshold is exceeded, the P225/P226C relay will
mechanical damage such as broken fan blades.The
generate an alarm signal.
risk of such problems can be eliminated by setting a
minimum time-lapse between stopping the motor and
re-starting it.
Wide range of features
to provide complete protection
for all types of application
> External trips To provide the user with more accurate information on
the motor's status and availability, the P22x relay keeps
The P22x relay accepts external binary signals, which track of:
can be used to give a trip or alarm signal, or which may (cid:127) Thermal status of the motor
simply be treated as binary information to be passed (cid:127) Load value as a % of full load current
up through the relay to a remote control system. (cid:127) Time to thermal trip
(cid:127) Temperature of each RTD*
> Shape of start-up current and voltage
(cid:127) Hottest RTD*
(cid:127) Authorised start number
The MiCOM P22x relay records the envelope of both
(cid:127) Time before another start-up authorisation
start-up current and voltage signals with a resolution of
(cid:127) Last start current magnitude
one sample for every 5 periods.This recording can be
(cid:127) Last start time value
uploaded to a PC via the communication network or via
the RS232 port on the front plate.It is very helpful to (cid:127) Number of starts and emergency starts
be able to visualise these curves during commissioning (cid:127) Total motor running hours
and this function of the MiCOM P22x avoids the need
for a plotter. > Event records
> Analogue outputs The last 75 status changes are recorded in a non-
volatile memory.This covers all status changes to logic
Two optional analogue outputs are available inputs and outputs, modifications to one or more
(P220/P225).Some information and measurements parameters, alarm signals or the operation of one of
such as power (P225), energy (P225) and temperature the output contacts.Events are logged every 1 ms.
values, etc., can be fed through a current loop to a
PLC. > Fault records
> Trip cause statistics The P22x relay records the last 5 faults.The
information provided in the fault record includes:
The MiCOM P22x relay provides the user with trip (cid:127) Fault number
statistics for every protection function.The user can (cid:127) Date and time
thus keep track of the number of trips, which have
(cid:127) Active setting group
taken place as well as their origin.
(cid:127) Faulty phase or phases
(cid:127) Function that gave the trip
MEASUREMENTS AND (cid:127) Magnitude of the value that gave rise to
RECORDING FACILITIES the trip command
(cid:127) Values of the phases and earth currents
> Measurements and voltage*.
The MiCOM P22x relay constantly measures a large > Disturbance records
amount of electrical data, such as:
(cid:127) Phase current magnitude in true RMS value: 5 resp.8 disturbance records, of 2.5 seconds each, can
IA, IB, IC be stored,.Disturbance record can be uploaded via the
(cid:127) Neutral current magnitude in true RMS value:IN communication network (RS485/optical fibre*) or locally
(cid:127) Positive sequence current I1 (RS232).
(cid:127) Negative sequence current I2
(cid:127) Zero sequence current Io
(cid:127) Unbalance ratio I1/I2
(cid:127) Frequency
(cid:127) Peak current value * available on some models.
(cid:127) Phase-to-phase voltage in true RMS value*
(cid:127) Active and reactive power W and VAR*
(cid:127) Active and reactive energies Wh and VARh*
(cid:127) Power factor*
Designed to secure
industrial processes
6>7
USER INTERFACE SOFTWARE SUPPORT
> Front plate and menus MiCOM S1 software makes it possible to pre-set all
MiCOM P22x relay parameters from a PC.The relay is
All the relay's parameters, ie., protection functions, then accessed via the RS232 port on the front panel.
logic controls, communication, LEDs, inputs and
outputs, can be programmed and modified by push- MiCOM S1 software is fully compatible with
buttons located on the front panel. WindowsTM(95, 98, NT, 2000, XP), and can download
An alphanumeric, highlighted, 32-character LCD relay settings, pull up current relay settings and upload
screen displays all the relay's data (settings, measurement values, diagnostic data, fault records,
measurements, etc.). disturbance records, start-up current and voltage
shapes and event logging data.
The menus are designed so that the user can move
around them easily, without confusion.The user will
HARDWARE DESCRIPTION
soon be at ease with the Human-Machine Interface.
> Case
> Dedicated and programmable LEDs
The MiCOM P220/P225 relays are housed in a 4U
4 LEDs show the relay's status (Trip, Alarm, Equipment
case and suitable for either rack or flush-mounted.
fault and Healthy).MiCOM P22x relay offers free
The relay can be withdrawn from its case with the
programming of 4 LEDs.Each LED can be assigned to
supply voltage on due to the presence of internal
one or more functions or logic states and then limit the
shorting links protecting the current circuits.
need for external signal lights.
The MiCOM P226C relay is housed in a particularly
> Push-buttons and function keys
flat compact case (H 309 x W 176 x D 93).
On account of its reversible connector blocks and its
The operator menu is accessed via 7 touch-sensitive
adjustable side mounting brackets the compact case
buttons and 4 function keys (P226C).
can be used for wall surface or panel-flush mounting.
> Local and remote communication
> Weight
The MiCOM P220/P225 relays are equipped with a (cid:127) P220: 2.5kg
RS485 port on its rear plate, which enables them to (cid:127) P225: 3.7kg
communicate via MODBUSTM, Courier* or (cid:127) P226C: 3kg
IEC 60870-5-103.It is thus possible to transmit
adjustment values, measurement data, alarm signals
and all other recordings to the Substation Control
System or to a SCADA.Communication parameters
can be adjusted by the operator via the user interface.
Communication failure does not affect MiCOM relays'
protective functions.
On P226C model the rear communication port is in
option and can offer two different connection types:
RS485 or optical fibre.
* available on some models
AREVA TRACK RECORD - MOTOR AND
OVERCURRENT PROTECTION RELAY
>> Over 30 years experience in motor protection.
>> MiCOM range introduced in 1999 derived from previous
successful range and user feedback.
>> Employ latest technology to enhance relay efficiency and reliability.
World-wide application with over 6000 units delivered.
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MATION-L3-P22x-BR-12.05-0810b-GB - © - AREVA - 2005.AREVA, the AREVA logo and any alternative version thereof are trademarks and service marks of AREVA.M is a registered trademark of AREVA.All trade names or trademarks mentioned herein whether registered or not, are the property of their owners.- 389191982 RCS PA
AUTOMiCO
Our policy is one of continuous development.Accordingly the
AREVA T&D Worldwide Contact Centre: design of our products may change at any time.Whilst every
effort is made to produce up to date literature, this brochure
http://www.areva-td.com/contactcentre/ should only be regarded as a guide and is intended for
information purposes only.Its contents do not constitute an offer
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