NHR17 series fuse type isolating switchDetailed product description：

Application scope of NHR17 series fuse type isolating switch

The NHR17 series fuse type isolating switch is a product with advanced international standards in the mid-1990s. Its rated insulation voltage is 800V, rated working voltage is up to 690V, rated working current is up to 630A, rated frequency is 50Hz, and it is used for high short circuit protection. However, it is generally not used for directly opening and closing a single motor. The performance indicators of this product comply with IEC947-3 and GB14048.3 standards.

Normal working conditions:
The ambient air temperature should not exceed+40 ℃, and the average temperature within 24 hours should not exceed+35 ℃. The lower limit of the ambient air temperature is
-5 ℃.
The altitude of the installation location for the two switches shall not exceed 2000m.
The relative temperature of the air at the installation site should not exceed 50% when the highest humidity is+40 ℃. Higher relative humidity is allowed at lower temperatures, and the average lowest temperature in the wettest month should not exceed+25 ℃
The maximum relative humidity shall not exceed 90%.
The pollution level of the environment where the 4 switches are installed is level 3.
The installation category of switch 5 is Class III.
The switch is installed in a place without vibration and impact.

characteristic
The installation base and housing of the NHR17 series fuse type isolating switch are made of plastic and designed with an anti electric shock cover. Therefore, this series of switches has the advantages of compact structure, light weight, reliable operation, safety, easy installation, and beautiful appearance.
Micro switches are installed on the two switches to provide power conversion for the indication of switch closure and disconnection.

Model and meaning:



Main technical parameters

Distribution fuse size

00

one

two

three

Power supply, frequency

AC、50Hz

AC、50Hz

AC、50Hz

AC、50Hz

Rated voltage (V)

six hundred and ninety

five hundred

four hundred

six hundred and ninety

five hundred

four hundred

six hundred and ninety

five hundred

four hundred

six hundred and ninety

five hundred

four hundred

Rated insulation voltage (V)

eight hundred

eight hundred

eight hundred

eight hundred

Power frequency withstand voltage (V)

three thousand

three thousand

three thousand

three thousand

Rated working current (A)

one hundred and sixty

two hundred and fifty

four hundred

six hundred and thirty

Agreed heating current (A)

one hundred and sixty

two hundred and fifty

four hundred

six hundred and thirty

Usage category

AC-21B(690V)

AC-21B(690V)

AC-21B(690V)

AC-21B(690V)

AC-22B(500V)

AC-22B(500V)

AC-22B(500V)

AC-22B(500V)

AC-23B(400V)

AC-23B(400V)

AC-23B(400V)

AC-23B(400V)

Rated connection capacity

725V、240A

725V、375A

725V、69OA

725V、945A

525V、480A

525V、750A

525V、1200A

525V、1890A

420V、1600A

420V、2500A

420V、4000A

420V、6300A

Rated breaking capacity

725V、240A

725V、375A

725V、69OA

725V、945A

525V、480A

525V、750A

525V、1200A

525V、1890A

420V、1280

420V、2000A

420V、3200A

420V、5040A

Rated short-circuit current (KA)

fifty

one hundred

one hundred

fifty

one hundred

one hundred

fifty

one hundred

one hundred

fifty

one hundred

one hundred

Loss power of fuse (W)

twelve

twenty-three

thirty-four

forty-eight

The matching relationship between switches and fuses

The agreed heating current (A)	Fuse size	Acceptable melt current value (A)
one hundred and sixty	00	4. 6, 10, 16, 20, 25, 32, 35, 40, 50, 63, 80, 10, 125, 160
two hundred and fifty	one	80, 100, 125, 160, 200, 224, 250
four hundred	two	125, 160, 200, 224, 250, 300, 315, 355, 400
six hundred and thirty	three	315, 355, 400, 425, 500, 630

Note: When a switch is used in an electric motor circuit, the rated current of the fuse is allowed to be greater than the agreed heating current of the switch.

NHR17 series fuse type isolating switch