MSP1000
Motor Protection System
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Real time true RMS measurement.
Current range 1.60 - 10,000 Amp
Can use low price instrument class CT's because of the
very low burden.
PC interface.
Memory of reserve capacity, trip causes, status and pre-trip
values, number of starts and running hours.
Can be used to protect variable frequency driven motors.
Current unbalance protection Level settable: 3%-40% in 1% steps,
Delay settable: 1s-30s in 1s steps, or -30 min., in 1 min. steps.
Switchable alarm/trip.
Earth fault protection
Short circuit protection, wide range settable.
Contactor trip inhibit. (class C coordination)
Stall protection.
Undercurrent protection.
Local and remote trip reset.
Phase reversal with switchable ABC or BAC Configuration.
INTRODUCTION
The MSP1000 Motor protection relays are
designed to protect electrical motors and
connected loads from possible damage whilst
minimizing the possibility of erroneous tripping
and providing full information to the operator.
The MSP1000 Motor protection relay is designed
to protect the motor from the following
occurrences.
Thermal overload and cooling problems by RMS
current measurement, thermistor monitoring, true
thermal models and programmable starting
conditions.
Mechanical overload by stall protection as well as
the thermal overload model.
Electrical fault conditions of short circuit, phase
imbalance, earth fault and phase reversal.
The MSP1000 Motor protection relay may be
configured to control Direct on Line (DOL), Direct
on Line Reversing (DOLR), 2 Speed, Star-Delta,
Auto-Transformer, Soft Start and Variable speed
drives.
Total protection means system protection not
just the motor
Up to 99A Full Load current can be monitored
directly with the 16mm internal diameter Current
transformers which are an integral part of the
Protection Unit whilst above this various
configurations of CTs can be provided.
Earth Leakage current can be monitored either
directly with the integral phase Current
transformers or for more accurate requirements a
Core Balance Current Transformer (CBCT) can
be connected.
The Monitor Unit provides a local Interface to the
operator and can display percentage load
current, phase current, unbalance, earth fault
current, reserve thermal capacity & remaining
time to trip. User configurable settings can be
monitored. Alarms and trips can be reset locally
or remotely.
The MSP1000 Motor protection relay can be
configured by a PC over a RS232 Serial Link or
alternatively via a MSP Gateway Device.
The MSP1000 Motor protection relay consists of
a Protection unit and an optional Monitor unit.
The units are intended for mounting in Motor
Control Centers
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MSP 1000 layout
Remote reset Contact input
See local reset button for more reset options.
External core balance CT input
2 methods for ground fault measurement
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CBCT: with core balance CT, for accurate
ground-fault measurement in [Amp]
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SPILL: without core balance CT, sufficient in
most cases were no external CT’s are used
for motor current measurement. in [%load]
Motor Current input
3 phase direct feed trough hole up to 100 A
Trip circuit
2 isolated circuits (NO/NC)
5A 380 Vac, 1250VA, 150W
Selectable failsafe/non-failsafe.
In non-failsafe selectable pulse tripping (shunt)
Alarm circuit
2 isolated circuits (NO/NC)
5A 380 Vac, 1250VA, 150W
Selectable failsafe/non-failsafe.
Options
Optional features
Control voltage
115 or 230 Vac
PC connection (RS232)
Connects to programming / readout PC with use
of Gateway multiple units on one PC.
Local reset button
Reset can also be done:
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Via remote reset contact
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Via programming PC
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Via local display
Alarm / Trip indicator
Led indication of an alarm / trip
Thermistor input
Integrated with thermal model, S/C and O/C
detection, switchable on/off . (Connection of
separate TRD unit possible.)
Remote reset contact input
see local reset button for more reset options
Monitor
Shows 12 readings of actual values and 13
settings. Indication of alarm and trip causes,
reset button, Relay test capability. Some
examples of readings:
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continuous reading of thermal capacity at all
times
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stall set limit and trip value
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earth fault limit and trip value
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unbalance limit and trip value
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undercurrent set limit
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phase reversal
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reserve capacity for allowable start
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reserve capacity alarm level
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time to trip
• short circuit limit as % of Imon
Technical specifications
In current ranges [Amp]
One model covering the range of 1.6
to 10,000 Amps. Using ../5A CT’s
Inom range
1.6 – 9.99 A
10.0 – 99 A
100 – 999 A
1.00 – 9.99 kA
10.0 – 99.9 kA
Step
0.01 A
0.1 A
1 A
0.01 kA
0.12 kA
CT’s
Int.
Int/Ext
External
External
External
NOTE: Interposing CT's may be low
cost
Instrument
Class
(IEC158/BS7626) because of the low
burden.
Thermal model T-6x In [sec]
Locked rotor time 1-60 sec in 0.1 sec
steps at 6xIn.
Reserve cap at 100% load (hot
curve) [%]
Level settable 10-100%.
Res.cap for start [%]
Settable reserve capacity level
needed for motor start. Start is
inhibited below this level. Switchable
trip if reserve capacity falls below this
level to always guarantee one start
capability.
Res.cap alarm level [%]
Warning level settable in % reserve
capacity; switchable on/off.
Time to trip alarm level [sec]
Warn if remaining time before trip
drops below level settable in sec;
switchable on/off.
Contactor trip inhibit
(class C coordination)
Level programmable from 200-1050%
of the set In in 10% steps.
If switched on it allows S/C to be
cleared without opening contactor.
Then trips contactor safely with
indication of short circuit.
Delay until current falls back below
level.
E/F Limit (Spill) % PH
Level programmable from 3-30% of
actual running load, in 1% steps.
Delay settable 1-10 sec, steps 1 sec.
Switchable alarm/trip.
E/F Limit (CBCT) [Amp]
Level settable 100 mA-10 A, in 100
mA steps.
Delay settable 50 msec-10 sec in 25
msec-1 sec. steps.
Switchable alarm/trip.
U/B Limit [%]
Level settable 3-40%, in 1% steps.
Delay settable, 1-30 sec in 1 sec
steps, or 1-30 min., in 1 min. steps.
Switchable alarm/trip.
Phase loss (U/B > 50%):
Delay settable: 1-30 sec, 1 sec steps;
always trips.
Phase reversal
Switchable trip/off.
Phase rotation switchable ABC/ BAC.
Detection time: 2 cycles.
Thermistor input
Integrated with thermal model, S/C
and O/C detection, switchable on/off.
(RTD via separate add-on option).
U/C Level [% In]
Level settable 10-100% of In, 1%
steps.
Delay programmable 1-30 sec, in 1
sec steps or 1-30 min., in 1 min.
steps.
Switchable on/off.
Switchable trip or alarm.
Stall limit [% In]
Level programmable from 100-300%,
steps 10%. Delay programmable from
50 msec-10 sec, steps 25 msec-1
sec.
Switchable on/off, always trips if on.
Memory
Reserve capacity is memorized
during power down.
Running status, trip causes, pre-trip
values, number of starts and running
hours are all memorized.
S/C Limit [% In]
Level programmable from 200-1050%
of the set In in 10% steps.
Delay 50 msec-10 sec., steps 25
msec-1 sec.
Excludes contactor trip inhibit
Trip relay
2 isolated circuits (NO/NC).
5A/380Vac, 1250VA, 150W.
Selectable failsafe/non-failsafe.
In non-failsafe selectable pulse
tripping (shunt).
Alarm relay
2 isolated circuits (NO/NC).
5A/380Vac, 1250VA, 150W.
Selectable failsafe/non-failsafe.
Control voltage
115 of 230 Vac (specify at order)
Plug-in LCD display
Shows 12 readings of actual values
and 13 settings
Indication of trip and alarm causes.
Reset button.
Relay test capability.
Cooling reduction motor off
Specifies reduction in cooling due to
stopped fan as compared to running
fan.
Normally set at 3.
External core balance CT input
Use special low power zener
protected core balance CT's.
* round cores / internal diameter
CB500-12/Z 46 mm
CB500-33/Z 65 mm
CB500-30/Z 85 mm
CB500-31/Z 145 mm
CB500-32/Z 245 mm
* square cores / inside dimension
CB5-1015SP/Z 100 x 150 mm
CB5-1020SP/Z 100 x 200 mm
CB5-1025SP/Z 100 x 250 mm
CB5-1030SP/Z 100 x 300 mm
CB5-1035SP/Z 100 x 350 mm
CB5-1040SP/Z 100 x 400 mm
All these cores are also available as
split cores. Consult factory for other
dimensions.
Dimensions
MSP1000
base
unit
(WxHxD)
154x74x96mm
3 cables holes round 16mm
MSP1000
monitor
130x90x42mm
door cut-out 81x121mm
(WxHxD)
Ambient temperature range
-10°C - +60°C (operating)
-50°C - +80°C (storage)