Explosion-Proof Cross-Limit Switch, Cross Limit Switch for Hazardous Area

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Cross travel limit switch for Hazardous area

Flameproof position limit switch.
Rugged and reliable, Limitex is designed to control the movement of overhead travelling cranes, hoists and complex machine tools operating in potentially explosive areas.

YOUR CONTACT

GBCRANES

0086-157 3711 5726

inquiry@gbcranes.com

Online Consultation

MAIN FEATURES

1. Positive opening NC contacts for safety functions.
2. Mechanical life of switches: 1 million operations.
3. Operation frequency: 3600 operations/hour max.
4. Protection degree: IP66.
5. Ambient temperature range: -40°C to +60°C.
6. It features rugged external enclosure made of G20 cast iron and cross rod support made of zinc alloy. Internal components are made of materials which guarantee long mechanical life and continuous performance.
7. Full Body Stainless Steel Version Available.

GENERAL SAFETY SPECIFICATIONS

Maximum power supply	250 Vac
Maximum current intensity	3 A
Maximum dissipated power	2 Watt
Rated frequency	50 / 60 Hz

GENERAL TECHNICAL SPECIFICATIONS

Operation frequency	3600 operations/hour max
Cable entry	Nr. 1 M20x1,5 - Nr. 1 M25x1,5 - Nr. 1 ½ NPT (cable glands not supplied)

OPTIONS

1. 2 or 4 snap action switches with 1NO+1NC change-over contacts.
2. Cross rods move to 3 or 4 maintained positions, with movement every 90°.
3. Modular adapter with fixing points.

LIMITEX WITH 2 CONTACTS

Utilisation category	AC 15
Rated operational current	3 A
Rated operational voltage	250 Vac
Rated thermal current	10 A
Rated insulation voltage	300 Vac
Mechanical life	1x10⁶ operations
Connections	Screw-type terminals
Wires	1x2.5 mm² , 2x1.5 mm² (UL - (c)UL: use 60°C or 75°C copper (CU) conductor and wire 16-18 AWG)
Tightening torque	0.8 Nm
Microswitch type	1 NO+1NC (All NC contacts are of the positive opening operation type )
Contacts	4 Microswitches 1NO+1NC
Scheme
Weight ( Kg )	4,5

MAXIMUM ACTUATING DIMENSION

T-type rod - Cross rod with 3 maintained positions
1. Pre-travel angle for rotation contact operation: 70°-49°
2. Maximum rotation angle for each maintained position: 90°
3. Average angle for the mechanical tripping: 48°
Rod - Rod and Roller
1. Pre-travel angle for rotation contact operation: 24°
2. Maximum rotation angle: 65°
Rod - Rod and Roller
1. Pre-travel angle for rotation contact operation: 49°
2. Maximum rotation angle for each maintained position: 90°
3. Average angle for the mechanical tripping: 48°
4. Maintained positions each: 90°

In order to ensure proper operations, the dimensions shall not be increased; anyhow, they can be decreased, taking into account that the closer the impact point is to the center of the head, the higher the impact and the mechanical wear of rod and shaft are.
IMPORTANT: the maximum impact speed is 1.35 m/s, refering to the ideal impact points showed in the drawing
OVERALL DIMENSIONS (mm)