Why Choose the ABB CM-PBE Phase Loss Monitoring Relay?
The ABB CM-PBE 1SVR550882R9500 is a compact and reliable three-phase phase loss monitoring relay designed to supervise phase failure in industrial three-phase mains. As part of the ABB CM-PBE three-phase monitoring relay series, it provides a straightforward method of detecting supply faults that could otherwise disrupt or damage motors, machinery and electrical installations.
This CM-PBE version monitors a 380–440 V AC phase-to-phase supply and is powered directly by the measuring circuit, eliminating the need for a separate auxiliary control supply. It is the version without neutral monitoring and is specifically intended for monitoring three-phase mains.
The relay provides one normally open (N/O) output contact and operates according to the closed-circuit principle. A 500 ms start-up delay and 150 ms tripping delay support dependable operation, while its slim 22.5 mm housing, DIN-rail mounting and screw terminals make it well suited to industrial control panels.
Key Advantages
- Dedicated three-phase phase loss monitoring relay.
- 380–440 V AC phase-to-phase measuring range for industrial three-phase supplies.
- Helps protect motors and machinery against phase failure.
- Powered directly by the measuring circuit with no separate auxiliary supply required.
- One normally open output contact for control and signalling circuits.
- Fast 150 ms tripping delay following fault detection.
- Compact 22.5 mm wide housing conserves DIN-rail space.
- Screw-terminal connections simplify installation in control cabinets.
Key Features
- ABB CM-PBE phase loss monitoring relay.
- Designed for phase failure detection in three-phase mains.
- 380–440 V AC L-L rated control supply and measuring voltage.
- Version without neutral monitoring.
- 1 N/O output contact.
- Closed-circuit operating principle.
- 500 ms start-up delay.
- 150 ms tripping delay.
- Powered by the monitored measuring circuit.
- LED indication for operational status.
- Screw terminals for electrical connections.
- Compact DIN-rail format for industrial control panels.
Reliable Phase Loss Monitoring for Three-Phase Systems
Phase failure can cause three-phase motors and other electrical equipment to operate incorrectly, overheat or stop unexpectedly. The ABB CM-PBE continuously supervises the three-phase supply and changes the state of its output relay when a phase failure condition is detected, enabling the associated control system to respond appropriately.
Because the CM-PBE is powered directly by the measuring circuit, installation is straightforward and requires no independent auxiliary supply. Its compact construction makes it particularly suitable for panel builders, machine builders and industrial installations where dependable phase supervision is required without occupying excessive DIN-rail space.
Typical Applications
- Three-phase motor protection circuits.
- Industrial machinery and production equipment.
- Pumps, compressors and ventilation systems.
- Phase failure detection in electrical distribution systems.
- Industrial automation and machine control panels.
- Conveyors and material handling equipment.
- Three-phase power supply supervision.
