Generator overcurrent and reverse power protection deviceDetailed product description：

ZFB92.93 (GENOP) Generator Overcurrent and Reverse Power Protection Device Purpose:

The ZFB92.93 generator overcurrent and reverse power protection device is a combined overcurrent and reverse power protection device. This device is mainly used for overcurrent and reverse power protection of three-phase AC generators on ships, and is also applicable to other similar places.

Relay model name:



Main technical parameters of ZFB92.93 (GENOP) generator overcurrent and reverse power protection device:

4.1 Rated voltage and frequency
AC 50Hz 380V or 100V;
AC 60Hz 440V or 110V.
4.2 Rated current: 1A or 5A.
4.2 Specifications
The device specifications and ordering codes are shown in Table 1.
4.4 Action Value
Overcurrent sections one, two, and three: (0.5-1.35) rated current
Short circuit: (1.0~3.0) rated current
Reverse power (1%~20%) rated current
4.5 Return coefficient
The return coefficient of the device is the ratio of the maximum return value of the device to its original state before the action, and should not be less than 0.85 for overcurrent and short-circuit protection, and not less than 0.8 for reverse power protection.
4.6 Action time
When 1.2 times the action value is applied, the device's action time should comply with:
Reverse power: 1s-6s (or 2s-12s)
Overcurrent: 5s~60s
Short circuit: 0.1s~0.6s
4.7 Power consumption
When the device operates normally at rated voltage, the power consumption of the voltage circuit is not greater than 5VA, and the short-term power consumption during tripping is not greater than 15VA; the power consumption of the current circuit per phase is not greater than 2VA at rated current.
4.8 Contact Performance
a) The tripping contact can reliably disconnect a current of 10A when the circuit voltage (AC) is not greater than 240V.
b) The tripping contact can continuously connect to AC 16A, but does not disconnect the circuit it is connected to.
c) The signal contact can connect and disconnect with an AC voltage not exceeding 60V and a current of 0.5A.
4.9 Dielectric Strength
The electrically unrelated conductive circuit parts in the device, as well as the conductive parts connected together, should be able to withstand an AC test voltage of 2.5kV (effective value) and 50Hz for 1 minute without insulation breakdown or flashover phenomenon for non-conductive metal parts (to ground).

Wiring diagram behind the relay:

The wiring diagram is shown in Figure 2.



Relay external dimensions and opening dimensions:
The device is of static type, with a protruding installation and pre board wiring structure. Its appearance and installation dimensions are shown in Figure 1,



Ordering instructions:
5.1 Product model, name, and rated frequency.
5.2 Order code (see Table 1).

Generator overcurrent and reverse power protection device（No image available）