Injection Transformer Block Rex 011 - ABB REG316 4 Series Operating Instructions Manual

REG 316*4 1MRB520049-Uen / Rev. C
2.9.

Injection transformer block REX 011

In conjunction with the injection unit Type REX 010, the injection
transformer block Type REX 011 supplies the injection and ref-
erence signals for testing the 100 % stator and rotor ground fault
protection schemes.
The injection transformer block used must correspond to the
method of grounding the stator circuit:
primary injection at the star-point:
secondary injection at the star-point:
secondary injection at the terminals:
Each injection transformer type has three secondary windings for
the following voltages:
Uis: stator injection voltage
Uir: rotor injection voltage
Ui:
The same injection transformer is used for stator and rotor pro-
tection schemes.
The rated values of the injection voltages Uis, Uir and Ui apply
for the version REX 010 U1 and a station battery voltage of U
= 110 V DC.
All the voltages are less by a factor of 96/110 = 0.8727 in the
case of versions U2 and U3.
Thus the primary injection voltage for the stator circuit is 96 V.
2.9.1. REX 011
This version is designed for primary injection at the star-point
and is available with the following rated voltages:
Uis
Uir
Ui
Table 2.1
*) The winding for voltage Uir has a tapping at 30 V. This enables Uir to be stepped down to 30 V or 20 V where an
injection voltage less than 50 V is necessary.
reference voltage connected to analogue input channel
8 of REG 316*4.
110 V
*)
50 V
25 V
REX 011
ABB Switzerland Ltd
REX 011
REX 011-1
REX 011-2.
Bat
2-13