HR6 Series Fuse-Switch Disconnector

Scope of Application

The HR6 series fuse-switch disconnectors (hereinafter referred to as “switches”) are mainly used in distribution circuits and motor circuits with high short-circuit currents, rated voltage AC 690 V and conventional free-air thermal current up to 630 A. They serve as power switches, isolating switches, emergency switches, and for circuit protection, but are generally not used for direct making and breaking of a single motor.
This product complies with IEC 60947-3 and GB/T 14048.3 standards.

Structural Features

The switch consists of a base, cover and arc chutes, all made of arc-resistant plastic, forming an all-plastic structure. The fixed contacts are directly mounted on the base. The arc chutes are easy to assemble and disassemble. Each arc chute has an inner chamber and an outer chamber, adopting multi-piece metal arc grids, which enhance the arc-extinguishing capability and improve contact life.
The NT-type fuse-links are installed inside the cover. The cover can rotate in a fan shape along the support, providing a large electrical isolation distance to meet the requirements of an isolating switch.
The cover can be easily removed from the base, making installation and replacement of fuse-links very convenient. The base has two sets of mounting holes to meet the installation requirements in various switchgears and on panels. Auxiliary contacts can be installed on both sides of the switch as required to provide signals indicating the open/closed status of the switch.

Normal Service and Installation Conditions

• Ambient air temperature not higher than +40°C and not lower than -5°C.
• Installation altitude not exceeding 2000 m.
• Humidity: At a maximum temperature of +40°C, the relative humidity of the air shall not exceed 50%. Higher relative humidity is permitted at lower temperatures (e.g., 90% at 20°C). Appropriate measures shall be taken against occasional condensation caused by temperature variations.
• Pollution degree of the surrounding environment is degree 3.
• The switch shall be installed in a location free from significant vibration, shock vibration and rain/snow exposure. The installation site shall be free from explosive media, and the medium shall contain no gases or dust sufficient to corrode metal or damage insulation.

Main Technical Parameters

■ Matching Relationship between Switch and Fuse-Links

Conventional free-air thermal current (A)	Fuse size	Rated operational voltage (V)	Fuse current rating (A)
160	NT00、RT16-00	AC-23B 400	2、4、6、10、16、20、25、32、40、50、63、80、100、125、160
160	NT00、RT16-00	AC-22B 690	2、4、6、10、16、20、25、32、40、50、63、80、100
250	NT1、RT16-1	AC-23B 400	40、50、63、80、100、125、160、200、225、250
250	NT1、RT16-1	AC-22B 690	40、50、63、80、100、125、160、200
400	NT2、RT16-2	AC-23B 400	160、200、250、300、315、350、400
400	NT2、RT16-2	AC-22B 690	–
630	NT3、RT16-3	AC-23B 400	315、400、500、630
630	NT3、RT16-3	AC-22B 690	315、400、500

Model	HR6-160	HR6-250	HR6-400	HR6-630
Rated insulation voltage (V)	690	690	690	690
Conventional free-air thermal current (A)	160	250	400	630
Rated operational current (A)	160	250	400	630
Rated conditional short-circuit current (kA)	50	50	50	50
Compatible NT fuse size	00	1	2	3
Pollution degree	3	3	3	3
Installation category	III	III	III	III

Note: Auxiliary switch rated voltage AC 380 V, conventional free-air thermal current 5 A, utilization category AC-15, rated operational power 300 VA.

Outline and Mounting Dimensions (mm)

Model	Overall Dimensions (mm)						Mounting Dimensions
Model	A(Max)	B(Max)	E	F	G(Max)	H(Max)	C	D	ΦA	ΦB
160A	215	138	40	40	142	252	200	80	Φ7	Φ7
250A	280	185	60	60	157	320	260	120	Φ9	Φ9
400A	300	220	60	71.5	195	360	280	143	Φ9	Φ9
630A	300	248	60	80	195	360	280	160	Φ9	Φ9

Ordering Instructions

When placing an order, the customer must specify the switch type characteristics, voltage rating, current rating, number of poles, operating method, quantity, etc. For special orders, please consult our company’s technical department.
Example: HR6-400/30 400 V, fuse current 315 A, 10 units