GE Industrial Solutions TKH-TKL User Manual
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TKH8S, TKH12S, TKL8S, and TKL12S Breakers
Introduction
This publication contains information on mounting
dimensions, lugs and lug covers, internal and external
accessories, and trip unit and rating plug selection for K
Frame molded-case circuit breakers, as shown in Figure
1. It also describes the installation of neutral current
sensors for ground-fault protection.
Lug and Lug Cover Selection
Circuit breakers are provided without lugs and with end
covers (suitable for bus connections). The available lugs
and lug covers are listed in Table 1.
• Lug covers are used with lug connectors.
• End covers are used when connecting a bus to the
breaker.
• Wire ranges:
– TCAL81: (3) 3/0–500 MCM Cu/Al
– TCO81A: (3) 3/0–500 MCM Cu
– TCAL121: (4) 250–350 MCM Cu or
250–500 MCM Al
– TCO121: (4) 250–400 MCM Cu
Molded-Case Circuit Breakers
MicroVersaTrip Plus™ Trip Unit in
GEH–5374A
Frame
Type
1200
Sensor Rating
(Amps)
800 All available TCAL81 TCO81A 286A8066G3 286A8066G2
1200 All available TCAL121 TCO121 286A8066G1 286A8066G2
Rating Plug
(Amps)
Table 1. Catalog numbers of lugs, lug covers, and end covers.
Standard Lugs
Cu/Al Cat. No.
Optional Lugs
Cu Cat. No.
Lug Covers
Cat. No.
End Covers
Cat. No.
Outline Drawing for TKH8S, TKH12S, TKL8S, TKL12S
Internal Accessories
Internally mounted accessories are UL listed and field
installable, except for the bell alarm, which is only factory
installed. Available accessories are listed in Table 2.
Pole Mounting Lead Exit
Accessory Installation
Left Center Right Side Back
Auxiliary Switches X X X
Shunt Trip X X X
Bell Alarm Switch X X X Any One
Undervoltage Release X X X plus
Combination Shunt
Trip with Aux Sw
Combination Under–
voltage with Aux Sw
UL listed.
Not UL listed.
Table 2. Available internal accessories and mounting positions.
For detailed information on accessory applications, see
the GE BuyLog, GEP-1100, and GEP-746.
Total No. of
Accessories
Within Any One
Breaker
X X X
X X X
Bell Alarm
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