Specifications

HarmonicGuard
®
Passive Options
20 HGP IOM Manual - Rev. D
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.
Table 2 – Fuse Monitor Operation Modes and Output Table
Operating State
Input
Voltage
HGP 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
HGP Filter has Blown
Trap Fuse
Nominal
Blown Trap
Fuse
Closed
Open
Blinking Red
or Off
HGP Fuse Monitor
has Blown Fuse
Nominal
Blown
Monitor
Fuse
Closed
Open
Blinking Red
or Off
HGP Filter Contactor
is Open
Nominal
Contactor
Open
Closed
Open
Off
Nominal
Nominal
Contactor
Closed
Open
Closed
Solid Green
*X = don’t care condition
** During unit power on / restart monitor LED will be blinking green
Table 3 – HGP 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