18
EATON
www.eaton.com
Controller operation and protection characteris-
tics
PXR4.1/PXR6.1 intelligent controller
General description of intelligent controller
Application environment
Operating temperature: -25°C~+70°C;
Storage temperature: -40°C~+85°C;
Relative humidity (RH): The average monthly maximum RH does
not exceed 90% in the wettest month at the mounting site, and
the average monthly minimum temperature does not exceed
+35°C in the same month. Condensation is allowed on the prod-
uct surface due to temperature changes.
Pollution degree: Level 3 (when equipped with the circuit breaker)
Mounting category: III (when equipped with the circuit breaker)
Operating power supply
The controller is fed simultaneously by an auxiliary power supply
and a power supply transformer, to ensure reliable operation even
under small load and short-circuit conditions. Two methods are
available to power up the controller:
a. By
CT
power
supply
The controller can work normally when the rated current is
greater than 400A, and the primary current is not less than 0.8I
n
for single-phase, and 0.4I
n
for three phases
b. By auxiliary power supply
Rated voltage: DC24V, with allowable variance range of ±15%
Rated power consumption: <7W
The trip units have below default settings:
• Long delay: I
r
= 1*I
n
at T
r
= 60s;
• Short delay: I
sd
= 3*I
r
at T
sd
= 0.1;
• Instantaneous: I
i
= 5*I
n
;
• Grounding: I
g
= 0.8*I
n
or 1200A (using the smaller value) at T
g
= 0.5s
Instruction Leafl et
Effective September 2022
IZM6 Series Air Circuit Breaker
Operating Instruction Leafl et
