load-break disconnector switches are designed for low-load breaking overhead MV electrical lines. Equipped with an air-break technology system combined with an isolating switch in series, this device provides visible opening and great safety in operation.
Category: Switchgear & High Voltage LBS
Brand: JGGY Electric
Model: ISAR-S/IACM
Power: 12KV/17.5kV/24kV/36kV/ 400A/630A/1250A
FOB Port: Ningbo/Shanghai
Terms of Pyament: Western Union,T/T,Paypal
Manually Operated Overhead Switch
The IACM-12/17.5/24/36kV overhead switch, placed at the end of a line in a tree-like HVA network structure, can isolate a cluster of substations for work on the downstream line. This device complies with Type I of the NF C 64-140 standard of 01/1990.
Construction Details
• Hot-dip galvanized steel profile frame compliant with the NF A 91 121 standard.
• Articulation: journaled on bronze bushing.
• Insulators: RP5 type tempered glass. Insulator rods with identical bases for all nine insulators.
• Aluminum bronze collars.
• Work-hardened copper blade driven by grease-free nylon rollers. Its C-shaped profile provides high short-circuit current resistance and reduced heating.
• Break contacts: wide penetration and alignment tolerances; permanent contact zone separate from the break contact.
• Perfect visibility of the "open" position. All live parts are stainless steel.
• Connections: 25mm diameter cylindrical aluminum pins for live working (LWT).
• Whip-type disconnect devices.
• Trumbler-type spring-loaded snap-closing device, acting directly on the moving shaft without driving the actuator, which only initiates movement.
• Elastic shaft stops at the end of travel.
• Support brackets made up of two symmetrical welded and galvanized profile elements, allowing the switch to be clamped to any support with head dimensions between 100 and 360 mm.
• Phase-insulating support for bird protection.
Mechanical control: It is designed to be secured to a corner of the support using a strap. It consists of:
• a lockable control lever with insulation;
• a lower tube with insulation;
• two telescopic tubes adjustable to approximately 300 mm, allowing it to be adapted to supports from 11 to 14 m;
• three roller tube guides (one tube and one tube guide can be supplied as an extra with supports from 15 to 18 m).
NO. | ltem | Unit | Data | ||||
1 | Rated voltage | KV | 12 | 17.5 | 24 | 36 | |
2 | Rated current | A | 200/400/630/1250 | ||||
3 | Rated active load breaking current | A | 50 | 50 | 50 | 50 | |
4 | Rated No-load transformer breaking current | A | 2.5 | 2.5 | 2.5 | 2.5 | |
5 | Rated No-load line breaking capacity | A | 10 | 10 | 10 | 10 | |
6 |
1min power frequency withstand voltage | phase to phase, to earth | KV | 42 | 45 | 55 | 95 |
across open contacts | KV | 48 | 55 | 69 | 105 | ||
7 |
Lightning impulse withstand voltage | phase to phase, to earth | KV | 75 | 95 | 125 | 170 |
across open contacts | KV | 85 | 105 | 145 | 195 | ||
8 | Rated short-time withstand curent | KA | 12.5 | 12.5 | 12.5 | 12.5 | |
9 | Rated short-circuit duration | S | 1 | 1 | 1 | 1 | |
10 | Rated peak withstand current | KA | 31.5 | 31.5 | 31.5 | 31.5 | |
11 |
Mechanical life | Times | 2000 | 2000 | 2000 | 2000 | |
12 | Manual operating torque | Nm | ≤200 | ≤200 | ≤200 | ≤200 | |
13 | Contact opening distance | mm | >500 | >60 | >800 | >1030 | |
14 | The position of the contact just closed is skewed | mm | >2/3 | >2/3 | >2/3 | >2/3 | |
15 | Contact pressure | N | 200 | 200 | 200 | 200 | |
16 | Three phase closing at different stages | mm | <3 | <3 | <3 | <3 | |
17 | Distance between charged bodies and relative ground | mm | >160 | >200 | >260 | >330 | |
18 | Main loop resistance | uΩ | ≤150 | ≤150 | ≤150 | ≤150 | |
24KV LBS with three-phase linkage, is mainly consist of frame, vacuum interrupter components, disconnector components and spring mechanism, disconnector and vacuum interrupter are fixed on frame via insulator, spring is fixed on frame.
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