Nema Type 1 Kit - Omron J1000 User Manual

8.4 Installing Peripheral Devices
Low Speed Operation and Motor Thermal oL Relays
Generally, thermal relays are applied on general-purpose motors. When general-purpose motors are driven by AC drives,
the motor current is approximately 5 ~ 10% greater than if driven by the commercial power supply. In addition, the cooling
capacity of a motor with a shaft-driven fan decreases when operating at low speeds. Even if the load current is within the
motor rated value, motor overheating may occur. A thermal relay cannot effectively protect the motor due to the reduction
of cooling at low speeds. For this reason, apply the UL recognized electronic thermal overload protection function built
into the drive whenever possible.
UL recognized electronic thermal overload function of the drive: Speed-dependent heat characteristics are simulated
using data from standard motors and force-ventilated motors. The motor is protected from overload using this function.
Using One Drive with Multiple Motors
Turn off the electronic thermal overload function. Please refer to the appropriate product instruction manual to determine
which parameter disables this function.
The UL recognized electronic thermal overload function of the drive cannot be applied when using multiple motors on
one drive.
Long Motor Cables
When long motor cables and high carrier frequency are used, nuisance tripping of the thermal relay may occur due to
increased leakage current. Therefore, reduce the carrier frequency or increase the tripping level of the thermal overload
relay.
Nuisance Tripping Resulting from High AC Drive Carrier Frequency
Current waveforms generated by high carrier frequency PWM drives tend to create additional temperature rise in overload
relays. Therefore, it may be necessary to increase the trip level setting when encountering nuisance triggering of the relay.
WARNING! Fire Hazard. Confirm an actual motor overload condition is not present prior to increasing the thermal oL trip setting. Check
local electrical codes before making adjustments to motor thermal overload settings.
u

NEMA Type 1 Kit

WARNING! Fire Hazard. Provide sufficient cooling when installing the drive inside an enclosed panel or cabinet. Failure to comply could
result in overheating and fire. When multiple drives are placed inside the same enclosure panel, install proper cooling to ensure air
entering the enclosure does not exceed 40 °C.
The optional NEMA Type 1 kit can be installed to raise the enclosure protection level of an IP20/Open-Chassis drive to
NEMA Type 1. Drives with a NEMA Type 1 kit cannot be installed using side-by-side mounting unless the top cover is
removed. The drive does not retain NEMA Type 1 integrity with the top cover removed.
and Spacing on page 27
n Installation Environment
Environment
Ambient Temperature
Refer to Installation Environment on page 26
n Exterior and Mounting Dimensions for NEMA Type 1 Kit
The following table matches each drive model with its appropriate drawing.
Protective Design
NEMA Type 1
156
for installation instructions.
Table 8.2 Installation Environment
-10 °C to +40 °C (NEMA Type 1/wall-mounted enclosure)
Drive reliability improves in environments without wide temperature fluctuations.
When using an enclosure panel, install a cooling fan or air conditioner in the area to ensure that the air temperature
inside the enclosure does not exceed the specified levels.
Do not allow ice to develop on the drive.
for all other installation environment specifications.
Table 8.3 Drive Models and Types
Single-Phase
200 V Class
B0P1
B0P2
B0P4
B0P7
B1P5
Conditions
Drive Model JZA
Three-Phase
200 V Class
20P1
20P2
20P4
20P7
21P5
22P2
24P0
SIEP C710606 33A OYMC AC Drive – J1000 User Manual
Refer to Installation Orientation
Three-Phase
400 V Class
–
40P2
40P4
40P7
41P5
42P2
43P0
44P0
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