TCi HarmonicGuard Series, Installation, Operation And Maintenance Manual

Page: 28 / 30

22 HGL IOM Manual - Rev. B
HarmonicGuard
®
Low Capacitance
Standard Option (S)
Fuse Monitor Operation and Relay Specifications
The fuse monitor relay contact is a single pole, double throw (SPDT) dry type contact. Terminal Block
connection TBa-7 is the common connection, TBa-6 is the Normally Closed (NC) connection, and
TBa-8 is the Normally Open (NO) Connection. If three-phase power with correct phase sequence is
presented to sense terminals of fuse monitor, the SPDT relay contact will change state as illustrated in
Table 2 below.
Table 2 – Fuse Monitor Operation Modes and Output Table
Operating State
Input
Voltage
HGL Filter
N.C.
Relay
Contact
(TBa-6 TBa-7)
N.O.
Relay
Contact
(TBa-7 TBa-8)
Monitor
Status
LED
No Input Line Voltage Not Present X* Closed Open Off
Input Line Voltage
has Missing Phase
Phase Loss X* Closed Open Blinking Red
Input Line Voltage
has Phase Reversal
Phase
Reversal
X* Closed Open Solid Red
HGL Filter has
Blown Trap Fuse
Nominal
Blown
Trap Fuse
Closed Open
Blinking
Red or Off
HGL Fuse
Monitor has
Blown Fuse
Nominal
Blown
Monito
r Fuse
Closed Open
Blinking
Red or Off
HGL Filter
Contactor is Open
Nominal
Contactor
Open
Closed Open Off
Nominal Nominal
Contactor
Closed
Open Closed Solid Green
Nominal Nominal
No
Contactor
Option
Installed
Open Closed Solid Green
*X = don’t care condition
** During unit power on / restart monitor LED will be blinking green
Table 3 – HGL Filter Fuse Monitor Relay Contact Specifications
Relay Contact Location Contact Rating
Normally Open Contact (TBa-7 TBa-8) 10A @ 277V AC/ 7A @ 30VDC
1 HP @ 250V AC, 1/2HP @125V AC, C300 Pilot Duty
Normally Closed Contact (TBa-6 TBa-7) 10A @ 277V AC/ 7A @ 30VDC
1 HP @ 250V AC, 1/2HP @125V AC, C300 Pilot Duty