Product Overview
Bulletin 7322 Thermal Overload Relay Heater Elements, Catalog L180
Condition
Unused new old stock, sold as one box of two heater elements. Box label legible: HEATERS, OVERLOAD RELAY, BUL. 7322, CATALOG NO. L180, FORM 36-47, with a yellow script monogram on a red disc between two red lightning bolts. Surface tarnish and discoloration on the metal of both elements. Verify suitability before use.
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Product Overview
Overload relay heaters for Bulletin 7322, catalog number L180, held under the Clark name and sold as one box of two. Motor current runs through the heater, and its heat drives the thermal trip element inside the overload relay, so a motor drawing too much current for too long trips the relay and drops out the starter.
Key Features
- Catalog number L180, Bulletin 7322 overload relay heater
- Two heater elements per box
- S-bent metal strip element with two mounting holes at each end, four per element
Applications
- Replacing a burned or missing L180 heater in a Bulletin 7322 overload relay during a starter rebuild
- Stocking a spare L180 pair with the maintenance parts for a motor control panel built on Bulletin 7322 overload relays
Frequently Asked Questions
Where is the L180 catalog number marked?
On the yellow box end label, in the CATALOG NO. box under BUL. 7322.
Are installation instructions included?
Not included.
Does the L180 heater sense motor temperature?
No. Motor current runs through the heater, and its heat drives the thermal trip element inside the Bulletin 7322 overload relay.
Two bent strips of metal whose whole job is to get warm at the right moment, which is exactly when the motor would rather keep running. With a spare L180 pair in the maintenance kit, a burned heater in a Bulletin 7322 relay becomes a swap instead of a parts hunt.
