Relay 100M Series

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The NewElec 100M Series electronic motor protection relay was designed to be used in compact flameproof gate-end boxes for protecting underground coal cutting machinery, pumps , fans and transformers. Designed to operate off 1 amp secondary windings of instrumentation grade current transformers yet able to provide full thermal (50/51) protection, unbalanced current and starts per hour (66) due to the low burden preventing saturation of current transformers smaller more compact instrumentation current transformers can be used with space saving benefit

Clearly marked descriptive warning LEDs indicate when the respective threshold settings are exceeded. In the event of a trip, the respective indication LED and the main trip LED are latched in order to assist maintenance personnel in identifying the cause for the trip.

Available in ampere calibration from 5 to 360A, split over three ampere ranges 101, 2, 3 and 4, or the 100M in percentage calibration. Selectable motor starting curves from Class 2 to Class 10 with thermal memory catering for 100% RMS load pattern modelled against the starts per hour selection as well as a thermal envelope that exactly accommodates the duty design parameters of the motor are available. This is achieved by selecting thermal lock-out periods ranging from 30s (120 stop – starts per hour) to 10 minutes (6 stop – starts per hour)

The main trip relay comprises 1 n/o and 1 n/c contact. The short circuit protection trip contact is a dedicated n/o designed to operate a shunt trip on a back-up circuit breaker.


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100M Series Brochure


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100M Series Installation Manual


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100M Series Presentation

Product List

Product Code 100M – 103M STANDARD RELAY
MAIN TRIP RELAY            : 1 x Normally Open
SHORT CIRCUIT RELAY : 1 x Normally Open + 1 x Normally Closed
MAIN TRIP RELAY:             1 x Normally Open + 1 x Normally Closed
SHORT CIRCUIT RELAY :  1 x Normally Open
120M  100M + Unbalance Disabled
(Original Contact Configuration)
FPR0885 120MC110
121M  100M + Unbalance Disabled
(Standard Contact Configuration)
FPR0123 121MC110
130M 100M + Unbalance Level 50% – Single Phase
(Standard Contact Configuration)
140M  100M + Original Contact Configuration
150M  100M + Start Time extended to 30 sec.
(Standard Contact Configuration)
160M  100M + Running Stall Protection
(Short Circuit removed).  Standard Contact Configuration.
FPR0542 160MC220
170M  100M + Short Circuit 400% to 800% Ie,
Unbalance Level 50%, Thermal memory removed with remote reset
(standard contact configuration)
175M  100M modified to 36KW Cutter Motor (VST 37 CUT)
P/N 528-955-125