Engineered for maximum capacity, the NP632160 is a 3-pole, 1600A molded case circuit breaker by Federal Pacific. It delivers dependable long-time and instantaneous (LI) fault protection. As a dedicated replacement, it installs into legacy FPE switchgear and distribution panels. The bolt-on busbar connection ensures a precise fit, eliminating the need for complex panel modifications. Capable of clearing severe faults with an 85 kAIC rating at 480VAC, it utilizes an interchangeable trip unit.
What type of switchgear is the NP632160 compatible with?
This breaker is specifically designed as a direct replacement for legacy Federal Pacific Electric (FPE) switchgear and distribution panels that require an NP frame molded case circuit breaker.
How is the NP632160 installed into the panel?
It uses a bolt-on busbar connection. When installing in older FPE switchgear, ensure the bus connections are clean and torqued to the original equipment specifications to maintain a secure, low-resistance contact.
How does the trip unit on the NP632160 operate?
It utilizes a thermal-magnetic trip mechanism with LI (Long-Time and Instantaneous) functions. The thermal element provides fixed overload protection, while the magnetic element is adjustable for instantaneous short-circuit protection.
Is the NP632160 suitable for high fault current applications?
Yes, it carries an interrupting rating of 85 kAIC at 480VAC, making it suitable for commercial and industrial distribution systems with high available fault currents.
Can I upgrade the trip unit on an existing FPE NP frame breaker?
Yes, aftermarket solid-state retrofit kits are available for legacy Federal Pacific NP frames. These kits allow you to upgrade to modern electronic trip functions without replacing the entire switchgear enclosure.
Can I install accessories like a shunt trip on this breaker?
Yes, the Federal Pacific NP frame supports internal accessories, including 120V shunt trips. Accessories must be specifically designed for FPE NP series breakers and are typically field-installed.
What precautions should be taken when replacing a 1600A FPE breaker?
Always de-energize the switchgear before servicing. Because the NP632160 is a legacy frame, inspect the existing panel busbars for signs of pitting or thermal damage before bolting on the replacement breaker.
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