DEIF RMV‑112D Over‑Under Voltage Protection Relay

Technical Specifications

Model:RMV‑112D

Brand:DEIF

System compatibility:Uni‑line series three‑phase over‑under‑voltage protection relay,ANSI code 27(under‑voltage) / 59(over‑voltage). Monitors generator or busbar three‑phase PT voltage signals. Cooperates with other Uni‑line synchroniser and protection relays to build complete genset protection system,applicable for marine and land‑based power station.

Function:Hardware‑type voltage protection unit. Measures three‑phase AC voltage. Over‑voltage setting range 100%‑120% Un,under‑voltage setting range 80%‑100% Un. Separate potentiometers adjust voltage threshold and trip time‑delay. Two independent potential‑free relay outputs for under‑voltage fault and over‑voltage fault. Built‑in hysteresis prevents relay chattering. No PC configuration software required,all parameters adjusted by front‑panel potentiometers.

Installation:35 mm DIN‑rail mounting or base screw mounting inside switchgear cabinet

Interface:

‑Terminal block:three‑phase PT voltage measuring input

‑2 groups potential‑free relay output terminals(under‑voltage / over‑voltage)

‑Front‑panel potentiometers for voltage threshold and trip‑delay adjustment

‑LED status indicators for power supply,under‑voltage and over‑voltage fault

Circuit feature:Analogue hardware measuring logic,response time＜100 ms,surge suppression for AC measuring inputs,3250V galvanic isolation between input and output,relay contact transient protection.

Feature:Marine classification approved;relay contact rating 250VAC / 24VDC,8A resistive load. Distinguished from RMV‑122D(double over‑voltage) and RMV‑132D(double under‑voltage).

Diagnostic:Front‑panel LED reflects power supply,under‑voltage and over‑voltage fault trigger status. Each fault corresponds to independent relay contact output for remote signal transmission.

Power supply:24VDC(18‑32VDC),typical power consumption 2.2W

Protection class:IP20

Horizontal operating temperature:‑25℃ ~ +70℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Shock & vibration:Complies with DNV marine environmental requirement

Weight:0.56kg

Dimensions:145mm ×110mm ×75mm

Certification:DNV,CE,marine type approval

Built‑in function

RMV‑112D voltage relay monitors three‑phase voltage of generator and busbar. It outputs trip relay signal when voltage drifts outside preset allowable range,to protect generator and electrical loads from abnormal‑voltage damage. Widely used for marine and industrial genset switchgear cabinets.

Product Brief

RMV‑112D belongs to DEIF Uni‑line series spare‑part family,combined three‑phase over‑under‑voltage protection relay(ANSI 27/59). Parameters adjusted by front‑panel potentiometers without configuration software. Widely applied for genset protection cabinet maintenance and renovation. ESD anti‑static protection shall be followed during installation.