REX010 Auxiliary units HESG324426R0001

Auxiliary unit for REG216/316*4
for 100% stator and rotor earth
fault protection

Our main products are widely used in metallurgy, oil and gas, glass manufacturing, aluminium, petrochemical, coal mining, paper printing, textile printing and dyeing, machinery, electronic manufacturing, automotive manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, power transmission and distribution, etc.

The unit is applied for the protection of generators in block configuration for earth faults
on the generator side. For the implementation
of the 100% stator and rotor earth fault
protection using a REG216/316*4, an injection unit REX010 and the injection transformer REX011 are required. This injection,equipment can be applied to all common
generator earthing- and excitation-systems.
The protection is active during all states of
the machine, standstill as well as run-up and run-down

General
The earth fault protection is based on the injection of a coded signal. The resulting offset
voltage is utilized to calculate the earth resistance (Rf).
The injection signal is produced in the injection unit REX010 and applied to the generator through the transformer unit REX011. For
the coupling to the protected unit resistors
(RE, RP) are used. For the rotor earth fault
protection two capacitors are required in
addition.
The measurement signals for earth fault protection are processed by the REG216 or the
REG316*4 respectively.
The equipment described protects 100% of
the generator stator winding. Two independent protection functions are applied: one for
95% and one, using a different algorithm, for
100% of the stator winding. The 100% function is calculating the earth resistance and the
95% function is measuring the neutral voltage
displacement of the generator.
a) The 100% function protects 35% of the
stator windings from the neutral point
for Rf = 0 and I0max = 15 A
b) The 95% function (U>) protects 95% of
the generator stator winding from the
terminals. This results in an overlap
(redundancy) of the two protection functions as seen in Fig. 1.
The 100% function increases in sensitivity
with increasing earth fault resistance and
decreasing earth fault current.

UNITROL 1010
UNITROL 1010-0002 LIGHT 3BHE035301R0002
UNITROL 1010-0003 BASIC 3BHE035301R0003
UNITROL 1010-0004 BASIC + SYNC 3BHE035301R0004

UNITROL 1020
UNITROL 1020-0003 BASIC 3BHE030579R0003
UNITROL 1020-0004 BASIC + SYNC 3BHE030579R0004
UNITROL 1020-0006 FULL 3BHE030579R0006
UNITROL 1020-0007 FULL + PSS 3BHE030579R0007

UNITROL 1000-PM40
​UNITROL 1000-PM40 3BHE015411R0001

We do other brands: ABB, Allen-Bradley, Schneider, GE (General electric), Westinghouse, FANUC, Bently, KUKA, Foxboro, Triconex, Honwell, YASKAWA, etc., if you need, you can contact me, look forward to your consultation.