DEIF TAC‑311DG Reverse‑Power Protection Relay P/N 1207000006C

Technical Specifications

Model:1207000006C(TAC‑311DG)

Brand:DEIF

System compatibility:Uni‑line series hardware‑type reverse‑power protection relay,ANSI code 32(anti‑motoring). Receives three‑phase PT voltage and CT secondary current signals. Detects reverse active‑power when generator runs as motor. Cooperates with other Uni‑line synchroniser and protection relays to build complete genset protection solution,applied for marine and industrial parallel generator systems.

Function:Analogue hardware reverse‑power protection unit. Monitors three‑phase voltage and current,calculates active‑power direction and magnitude. Reverse‑power threshold adjustable via front‑panel potentiometer,setting range 2%‑20% Pn. Trip delay adjustable 1‑10 seconds. Two change‑over potential‑free relay outputs:one for breaker trip command,the other for fault alarm signal. No PC configuration software required,all parameters adjusted locally by potentiometers.

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

Interface:

‑Screw terminal:three‑phase PT voltage input,three‑phase CT current input

‑2 sets change‑over relay output terminals(trip and alarm signal)

‑Front‑panel potentiometers for reverse‑power threshold and trip‑delay adjustment

‑LED status indicators for power supply,reverse‑power detection and relay action

Circuit feature:Hardware measuring logic,surge suppression for PT/CT input terminals,galvanic isolation between input‑output‑auxiliary power supply,relay contact transient protection.

Feature:Marine classification approved;relay contact rating 250VAC / 24VDC,8A resistive load. Measuring voltage up to 690V AC,CT secondary 1A/5A selectable. CT polarity must be strictly checked during commissioning,false action will occur if polarity is reversed.

Diagnostic:Front‑panel LED reflects power supply,reverse‑power fault detection and relay tripping status. Independent alarm contact provides remote fault signal transmission.

Power supply:24VDC(18‑32VDC),typical power consumption 2.8W

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:0.74kg

Dimensions:145mm ×110mm ×75mm

Certification:DNV,CE,marine type approval

Built‑in function

1207000006C(TAC‑311DG) reverse‑power relay detects anti‑motoring fault of paralleled generator. When generator absorbs active power from busbar instead of outputting power,it outputs trip signal to open generator breaker to prevent generator damage caused by motor‑running condition. Widely used for marine and industrial genset parallel switchgear cabinet spare‑part replacement.

Product Brief

1207000006C is DEIF part number for TAC‑311DG,Uni‑line series hardware reverse‑power protection relay(ANSI 32). CT wiring polarity inspection is mandatory before commissioning. Parameters adjusted by front‑panel potentiometers without configuration software. Widely applied for power‑equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.