ABB SPAM 150 C is a current-measuring multifunction protection relay for complete AC-motor protection; the model is verified, but the model-only request does not identify the complete RS 641 contact, frequency, and auxiliary-supply configuration.
- Manufacturer: ABB
- Model: SPAM 150 C
- Product type: Current-measuring multifunction motor protection relay
- Measured currents: Three phase currents IL1, IL2, IL3 and neutral current I0
It operates as a secondary protection device connected to the protected motor drive's current transformers, continuously evaluating the three phase currents and neutral current, calculating motor thermal condition, supervising start and restart limits, and issuing alarm, trip, restart-enable, and self-supervision indications according to its programmed relay matrix. The relay handles 1 A or 5 A CT secondary currents, phase-current and neutral-current measurement, an external control input, contact outputs, and optional fibre-optic SPA serial communication. Its protection functions include thermal overload, start/stall supervision, high-set and low-set overcurrent, non-directional earth fault, phase unbalance or incorrect phase sequence, undercurrent, and cumulative start-time restart inhibit. SPAM 150 C is applied with motor CTs, a contactor or circuit breaker, the correct SPTU power-supply/output module, the SPCJ 4D34 measuring module, SPTE 4E3 input module, optional SPA-ZC17/SPA-ZC21 bus module, and the exact feeder wiring and protection study in industrial motor feeders; ABB also documents use for feeders, transformers, and other non-rotating objects requiring the supported overcurrent, overload, or earth-fault functions.
Important Notice: Verify SPAM 150 C and the complete RS 641 014/015 ordering number on the physical relay before configuration, installation, or supply.
Apter Power SPAM150C Manuals and Guides
Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.
Medium and large AC-motor feeders
Protects three-phase motors supplied through conventional contactor- or circuit-breaker-controlled drives using CT secondary-current inputs.
Motor start and stall supervision
Evaluates configured start current and time, thermal stress, cumulative start time, and restart-inhibit conditions before another start is permitted.
Motor feeder fault protection
Detects configured overcurrent, earth fault, phase unbalance or incorrect sequence, and undercurrent conditions and operates alarm or trip contacts.
Feeder or transformer overload protection
ABB documents use on non-rotating objects requiring supported single-, two-, or three-phase overcurrent/overload and non-directional earth-fault protection, subject to an engineered protection study.
Read and follow the current ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1
Confirm the complete RS 641 ordering number, not just SPAM 150 C, because trip-contact type, rated frequency, and auxiliary-voltage range vary by suffix.
2
Verify the relay front/rear label, SPTU module type, 50/60 Hz suffix, and 1 A/5 A current-input terminal selection before energization.
3
Isolate the motor feeder, auxiliary supply, trip circuits, external control circuits, and CT secondary circuits using the site's approved protection-maintenance procedure.
4
Never open-circuit an energized CT secondary; short and isolate CT circuits using the switchgear's approved test facilities before disconnecting relay current inputs.
5
Calculate and approve all thermal, stall, overcurrent, earth-fault, unbalance, undercurrent, start-count, and restart-inhibit settings from the actual motor, CT, starter, network, and protection-coordination data.
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