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2. Installation
VFR Voltage Frequency Relay
2.3
Instruction Manual: VFR GBM 06/10/2021
Note: Precautions must be taken in system designs to avoid potential high electromagnetic disturbance which may result in
unstable network and malfunction of the relays.
21
22
23
24
25
26
31
32
33
34
1 2 3
10 11 12 13 14 15 16
90 91
A
B
C
ORION ITALIA
VFR - 100x
RS-485 Master
+
-
VOLTAGE
INPUTS
Vn=277/480Vac
AUX8
AUX7 AUX6
A
B
C
voltage transformers connection
DELTA
a (32)
b (33)
c (34)
LOW VOLTAGE THREE-PHASE SYSTEM
(B)
+
(A)
-
AUXILIARY POWER
80(115)-230(300) Vac(Vdc)
24Vdc
48Vdc
n.u
-
+
N
51
52
53
54
55
56
AUX5
AUX4
AUX3
AUX2
AUX1
41
42
43
DI.com
DI.1
DI.2
A
B
C
a (32)
b (33)
c (34)
voltage transformers connection
WYE
N
n (31)
N
o
t
U
sed
Note:
* Output Contacts AUX1 - AUX8:
Use surge suppressor on output
contacts when control contactors
or inductive loads
° Digital Inputs:
3m Max wiring lenght
(°)
see Order Code
K
A1
A2
Figure 2.4
–
Surge suppressors on contactor coils
Figure 2.3
–
Wiring diagram