The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.

140AMM09000 Output module

Environmental protection and disposal! The media used in the operation of the pressurized system equipment may not be environmentally compatible. Media that are damaging the environment must be disposed separately from normal waste. Observe the legal requirements in the country of installation.Application The protective reverse power relay type RMP-121D forms part of a complete DEIF series of relays for protection and control of generators, and is applicable to both marine and land-based installations. Also available are overload relays (RMP-111D) and combined overload and reverse power relays (RMP-112D). The RMP-121D is type approved by major classification societies. The protective reverse power relay will prevent a generator running in parallel with other generators from running as a motor (“motoring”) in case of lost prime mover torque, and will thus protect the prime mover, at the same time ensuring that the remaining generators connected to the system are not overloaded. The RMP-121D likewise protects against reverse power arisen from an increase of the power of other generators connected to the system.

Measuring principle

The applied TDM (Time-Division-Multiplication) principle ensures an accurate measurement of the RMS value of the power (U x I x cos-ϕ), irrespective of wave form. The RMP-121D is available with the following connections: 1W single phase 1W3 1 element 3 phase 3 wire, balanced load 1W4 1 element 3 phase 4 wire, balanced load The set point value is set on the front of the relay by means of a potentiometer. If exceeded, a fault signal is generated, and the associated yellow LED is lit. Timer function The RMP-121D can be delivered with two different timer characteristics: - Normal timer characteristic means that the delay does not depend on the exceeding of the set point. - Inverse timer characteristic means that if the –P set point is exceeded by 10% of nominal power, the inverse timer functionality gives the same delay as the time potentiometer. If the –P set point is exceeded by 20% of nominal power, the delay will be half the value set on the time potentiometer

Relay output 

The RMP-121D is provided with an output with a minimum contact, either normally energised or normally deenergised. The contact may be set to open or to close on activation. Normally energised contact Recommended for land-based installations for warning and alarm purposes. In case of an auxiliary supply drop-out, the contact is immediately activated. Normally de-energised contact Recommended for marine installations for regulating and control purposes. An auxiliary supply failure will not result in an unwanted activation of the contact. Latch circuit The contact can be locked in its warning position, even if the input returns to normal (add “L” to contact type in order specifications, if this is required). Disconnecting the auxiliary supply resets the latch circuit. Hysteresis In order to avoid “chatter” on the relay contacts the contact functions are provided with a hysteresis, i.e. a difference of 2% of full scale between energising and de-energising of the relay. Power-up/power-down circuits The RMP-121D is provided with a 200 ms power-up circuit, ensuring the correct function of the relay on connection of the auxiliary voltage. Note: Normally energised contacts are not activated until 200 ms after connection of the auxiliary voltage. Likewise, the RMP-121D has a ride-through circuit that allows for continued operation, supervision and maintenance in the event of a momentary loss of power for up to 200 ms.