HH15 Fuse-Switch Disconnectors Manufacturer

HH15 Fuse-Switch Disconnector

The HH15 series is a high-performance range of Fuse-Switch Disconnectors (QSA type) and Switch-Disconnectors (QA/QP types), engineered for low-voltage distribution and motor circuits characterized by high prospective short-circuit currents. Primarily utilized as a master switch for manual infrequent operation, the HH15 ensures reliable circuit isolation and overcurrent protection.

Description

Product representative image

Scope of Application

This series is specifically optimized for integration into advanced drawer-type low-voltage complete equipment, such as GCS, GCK, and MNS cabinets. Whether used for making, breaking, or isolating electrical circuits, the HH15 provides a robust safety interface between the power source and the load. Its versatility allows it to function as a main incoming switch or a feeder unit in complex industrial grids. The series fully complies with the international and national standards IEC 60947-3 and GB/T 14048.3, making it a globally recognized solution for heavy-duty power management.

Application Scenarios

Industrial Switchgear: Serving as the core isolation component in high-end drawer-type distribution cabinets.

Motor Control Centers (MCC): Providing manual master control and maintenance isolation for heavy-duty motor circuits.

Power Distribution Panels: Acting as a reliable primary switch in manufacturing plants, commercial infrastructure, and substations.

Emergency Power Transfer: The QSS/QPS "Double-Head" (Changeover) versions are ideal for manual switching between two independent power sources or for reversing motor directions.

High-Fault Current Environments: Deployed in circuits requiring high short-circuit withstand capabilities (up to 100kA with appropriate fuses).

Normal working conditions

Ambient Air Temperature: The operating environment should remain between -5°C and +40°C. For long-term reliability, the average temperature over any 24-hour period must not exceed +35°C.

Installation Altitude: The altitude of the installation site should not exceed 2,000 meters; de-rating is required for higher altitudes.

Atmospheric Stability: Relative humidity should not exceed 50% at the maximum temperature of +40°C. Higher humidity (up to 90% at +25°C) is permissible at lower temperatures, provided that measures are taken to manage potential condensation on the device surface.

Environmental Class: Rated for Pollution Degree 3, the series is suitable for industrial environments. The installation site must be free from intense vibration, physical impact, or corrosive agents that could damage the insulation or metallic components.

Structural features

The HH15 series is distinguished by its modular architecture and multiple contact structures designed for specialized applications. The series includes the QSA (Switch-Disconnector with Fuse), which features a Double Breakpoint (series contact) structure for enhanced arc-extinguishing and total isolation when equipped with RT16 (NT) series fuses.

For applications not requiring integrated fuses, the QA type offers a double-breakpoint isolation structure, while the QP type utilizes a Parallel Contact (single breakpoint) architecture, offering a more compact footprint. A major innovation of the series is the QSS/QPS "Double-Head" Double-Throw mechanism, which enables the manual transfer of loads between two distinct circuits through a single rotary handle.

The switch is constructed from high-strength, flame-retardant materials with superior dielectric properties. The ergonomic rotary operating mechanism can be interlocked with the cabinet door, ensuring the door remains locked when the switch is in the "ON" position. Furthermore, the HH15 supports the addition of auxiliary contacts (1 NO/NC or 2 NO/NC), allowing for seamless integration into automated control systems for remote status signaling and logic interlocking.

Product Model and Its Meaning

HH15 Fuse-Switch Disconnector

Technical Parameters

The HH15 range is engineered to provide superior performance under the most demanding electrical loads.

Diverse Current Range: Available in a wide variety of conventional heating currents (A) to accommodate diverse load requirements from small feeders to large industrial mains.

Multi-Pole Configuration: Supports 2-pole, 3-pole, and 4-pole configurations, allowing for precise control of single-phase and three-phase power systems.

Utilization Category: Rated for high-duty categories such as AC-23A/B, the HH15 is capable of safely making and breaking highly inductive loads and frequent motor operations.

Fuse Coordination & Protection: The QSA model is specifically designed for use with RT16 (NT) series HRC fuses. When properly coordinated, the switch can safely withstand prospective short-circuit currents up to 100kA, effectively isolating faults and protecting downstream equipment.

Dielectric Safety: With high rated insulation voltages (Ui) and impulse withstand voltages (Uimp), the HH15 provides a massive safety margin against transient overvoltages and grid surges.

Global Compliance: Every unit is rigorously tested to meet IEC 60947-3 and GB/T 14048.3 standards, ensuring that the switch delivers a visible isolation gap and reliable load-breaking performance in any professional electrical installation.

Specification	63	125	160	250	400	630	800	1000	1250	63
Number of poles	3,4,3+N	3,4,3+N	3,4,3+N	3,4,3+N	3,4,3+N	3,4,3+N	3,4	3,4	3,4	3,4,3+N
Rated insulation voltage Ui(V)	Ue=380V时，Ui=660V。Ue=660时，Ui=1000V。						800
Rated operating voltage Ue(V)	AC380、AC660						AC415,690
Conventional heating current Ith(A)	63	125	160	250	400	630	800	1000	1250	63
Rated operating	380V:AC-23B 415V:AC-22B	63	125	160	250	400	630	800	1000	1250
current (A)	660V:AC-23B	63	100	100	200	315	425	500	630	800
	690V:AC-22B	63	100	100	200	315	425	500	630	800
Rated limited short circuit current 380V :(kA	100	100	100	100	100	100	100	100	100	100
Rated limited short circuit current 660V :(KA)	50	50	50	50	50	50	50	50	50	50
Mechanical life (second)	15000	15000	12000	12000	12000	3000	500	500	500	15000
Electrical life (second	1000	1000	300	300	300	200	100	100	100	1000
Fuse rated current (A)380V/660V:	63/63	125/100	160/100	250/200	400/315	630/425	800/500	1000/630	1250/800	63/63
Type of fuse	RT16-00、NT00	RT16-00、NT00	RT16-00、NT00
Operating torque Nm	7.5	7.5	16	16	16	30	40	40	40	7.5
Auxiliary contacts heating current lth 380V, AC-15(A)	5	5	5	5	5	5	5	5		5

External appearance and installation dimensions

Switch specification	A	B	C	D	E	F	G	H	I	M	P
HH15-63	155	100	175	90	135	88	20	72	38	5	12
HH15-125	155	116	175	90	135	101	21.5	69	41	6	15
HH15-160	240	146	198	130	100	126	27	106	65	8	20
HH15-250	245	160	198	130	100	135	33	106	65	10	25
HH15-400	245	160	198	130	100	135	33	106	65	10	25
HH15-630	345	270	242	208	315	230	82	87	87	12	40