User guide

FITLER AND FUSE MONITOR OPERATION
Filter and Fuse Monitor Operation HGP IOM Manual
21
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)
No Input Line Voltage
Not Present
X*
Closed
Open
Input Line Voltage has
Missing Phase
Phase Loss X* Closed Open
Input Line Voltage has
Phase Reversal
Phase
Reversal
X* Closed Open
HGP Filter has Blown
Trap Fuse
Nominal
Blown
Trap Fuse
Closed Open
HGP Fuse Monitor has
Blown Fuse
Nominal
Blown
Monitor
Fuse
Closed Open
HGP Filter Contactor is
Open
Nominal
Contactor
Open
Closed Open
Nominal Nominal
Contactor
Closed
Open Closed
*X = don’t care condition
Table 3 – HGP Filter Fuse Monitor Relay Contact Specifications
Relay Contact
Location
Contact Rating
Normally Open Contact (TBa-7 TBa-8)
10A Resistive @ 240V AC
1/3HP @ 120/240V AC
Normally Closed Contact (TBa-6 TBa-7)
10A Resistive @ 240V AC
1/6HP @ 120/240V AC
Figure 3 – HGP Filter Fuse Monitor Typical Connection Circuit Diagram