140
Transformer module (TRM)
Chapter 10
Hardware modules
3
Transformer module (TRM)
3.1
Design
A transformer input module can have up to 10 input transformers. The actual number depends
on the type of terminal. Terminals including only current measuring functions only have current
inputs. Fully equipped the transformer module consists of:
•
Five voltage transformers
•
Five current transformers
The inputs are mainly used for:
•
Phase currents
•
Residual current of the protected line
•
Residual current of the parallel circuit (if any) for compensation of the effect of
the zero sequence mutual impedance on the fault locator measurement or residual
current of the protected line but from a parallel core used for CT circuit supervi-
sion function or independent earth fault function.
•
Phase voltages
•
Open delta voltage for the protected line (for an optional directional earth-fault
protection)
•
Phase voltage for an optional synchronism and energizing check.
3.2
Technical data
Table 161: TRM - Energizing quantities, rated values and limits
Quantity
Rated value
Nominal range
Current
I
r
= 1 or 5 A
(0.2-30)
×
I
r
(0.2-15) x I
r
for line differential
function
Operative range
(0.004-100) x I
r
Permissive overload
4
×
I
r
cont.
100
×
I
r
for 1 s
*)
Burden
< 0.25 VA at I
r
= 1 or 5 A
Frequency
f
r
= 50/60 Hz
+/-10%
*)
max. 350 A for 1 s when COMBITEST test switch is included.
Содержание REL 551-C1*2.5
Страница 1: ...Technical reference manual ProtectIT Line differential protection terminal REL 551 C1 2 5 ...
Страница 23: ...14 Introduction to the technical reference manual Chapter 1 Introduction ...
Страница 39: ...30 Technical data Chapter 2 General ...
Страница 63: ...54 Blocking of signals during test BST Chapter 3 Common functions ...
Страница 71: ...62 Line differential protection phase segregated DIFL Chapter 4 Line differential protection ...
Страница 89: ...80 Thermal phase overload protection THOL Chapter 5 Current ...
Страница 101: ...92 Event function EV Chapter 7 Logic ...
Страница 160: ...151 Chapter 11 Diagrams Chapter 11 Diagrams This chapter contains the terminal diagrams for the terminal ...
Страница 162: ...153 Terminal diagrams Chapter 11 Diagrams 1 2 Terminal diagram REL 551 C1 Figure 38 REL 551 C1 ...
Страница 163: ...154 Terminal diagrams Chapter 11 Diagrams Figure 39 REL 551 C1 with DC switch ...
Страница 167: ...158 Terminal diagrams Chapter 11 Diagrams ...