Branch circuit protection

Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protection must be provided in accordance with the National Electrical Code and any additional local codes (US) or Canadian Electrical Code, Part 1 (CA).

WARNING ‑ The opening of the branch-circuit protective device may be an indication that a fault current has been interrupted. To reduce the risk of fire or electric shock, current-carrying parts and other components of the controller should be examined and replaced if damaged. If burnout of the current element of an overload relay occurs, the complete overload relay must be replaced.

ATTENTION ‑ LE DÉCLENCHEMENT DU DISPOSITIF DE PROTECTION DU CIRCUIT DE DÉRIVATION PEUT ÊTRE DÛ À UNE COUPURE QUI RÉSULTE D'UN COURANT DE DÉFAUT. POUR LIMITER LE RISQUE D'INCENDIE OU DE CHOC ÉLECTRIQUE, EXAMINER LES PIÈCES PORTEUSES DE COURANT ET LES AUTRES ÉLÉMENTS DU CONTRÔLEUR ET LES REMPLACER S'ILS SONT ENDOMMAGÉS. EN CAS DE GRILLAGE DE L'ÉLÉMENT TRAVERSÉ PAR LE COURANT DANS UN RELAIS DE SURCHARGE, LE RELAIS TOUT ENTIER DOIT ÊTRE REMPLACÉ.

Standard fault current

For devices without connection box PZM2xA-0075-D02.., or PZM2xA-0150-D03..
Model	Frame size	SCCR: 5 kA / 3 × 500 V
Model	Frame size	Non-semiconductor fuses (currents are maximum, voltages minimum values)	Inverse time circuit breakers (currents are maximum, voltages minimum values)
MPX22A-..-0055.. (2.2 kW)	2	20 A / 500 V	20 A / 500 V
MPX22A-..-0070.. (3.0 kW)	2	25 A / 500 V	25 A / 500 V
MPX22A-..-0095.. (4.0 kW)	2	35 A / 500 V	35 A / 500 V
MPX22A-..-0125.. (5.5 kW)	2E	50 A / 500 V	50 A / 500 V
MPX22A-..-0160.. (7.5 kW)	2E	60 A / 500 V	60 A / 500 V
MPX23A-..-0240.. (11.0 kW)	3	60 A / 500 V	60 A / 500 V
MPX23A-..-0320.. (15.0 kW)	3	60 A / 500 V	60 A / 500 V
MPX23A-..-0460.. (22.0 kW)	3E	100 A / 500 V (Class CF, J, K-1, L, RK1 or T)	100 A / 500 V
MPX23A-..-0620.. (30.0 kW)	3E	100 A / 500 V (Class CF, J, K-1, L, RK1 or T)	100 A / 500 V

For devices with connection box PZM2xA-0075-D02.., or PZM2xA-0150-D03..
Model	Frame size	SCCR: 5 kA / 3 × 500 V
Model	Frame size	Non-semiconductor Class J fuses (currents are maximum, voltages minimum values)
MPX22A-..-0055.. (2.2 kW)	2	20 A / 500 V
MPX22A-..-0070.. (3.0 kW)	2	25 A / 500 V
MPX22A-..-0095.. (4.0 kW)	2	35 A / 500 V
MPX22A-..-0125.. (5.5 kW)	2E	40 A / 500 V
MPX22A-..-0160.. (7.5 kW)	2E	40 A / 500 V
MPX23A-..-0240.. (11.0 kW)	3	40 A / 500 V
MPX23A-..-0320.. (15.0 kW)	3	40 A / 500 V

For devices with connection box PZM23A-A300-D05..
Model	Frame size	SCCR: 5 kA / 3 × 500 V
Model	Frame size	Non-semiconductor Class J fuses (currents are maximum, voltages minimum values)
MPX23A-..-0460.. (22.0 kW)	3E	100 A / 500 V
MPX23A-..-0620.. (30.0 kW)	3E	100 A / 500 V

Standard fault current for group installation

All models are suitable for group installation except devices with connection box PZM2xA-0075-M16-.

For devices without connection box PZM2xA-0075-D02.., or PZM2xA-0150-D03..
Model	Frame size	SCCR: 5 kA / 3 × 500 V
Model	Frame size	Non-semiconductor fuses (currents are maximum, voltages minimum values)	Inverse time circuit breakers (currents are maximum, voltages minimum values)
MPX22A-..-0125.. (5.5 kW)	2E	60 A / 500 V	60 A / 500 V
MPX22A-..-0160.. (7.5 kW)	2E	60 A / 500 V	60 A / 500 V
MPX23A-..-0240.. (11.0 kW)	3	60 A / 500 V	60 A / 500 V
MPX23A-..-0320.. (15.0 kW)	3	60 A / 500 V	60 A / 500 V

For devices with connection box PZM2xA-0075-D02.., or PZM2xA-0150-D03..
Model	Frame size	SCCR: 5 kA / 3 × 500 V
Model	Frame size	Non-semiconductor Class J fuses (currents are maximum, voltages minimum values)
MPX22A-..-0055.. (2.2 kW)	2	60 A / 500 V
MPX22A-..-0070.. (3.0 kW)	2	60 A / 500 V
MPX22A-..-0095.. (4.0 kW)	2	60 A / 500 V
MPX22A-..-0125.. (5.5 kW)	2E	60 A / 500 V
MPX22A-..-0160.. (7.5 kW)	2E	60 A / 500 V
MPX23A-..-0240.. (11.0 kW)	3	60 A / 500 V
MPX23A-..-0320.. (15.0 kW)	3	60 A / 500 V