The equipment is commonly used for testing of solid insulating materials. This test apparatus is covered in IEC 60695-2-10 and commonly referred for various devices in many standards such as IEC 60335, IEC 60695-2-11, IEC 60695-2-12, IS 11000, IEC 60598-1, IEC 60947, IEC 60898, IEC 61008-1, IEC 60669-1, IEC 60884-1, IEC 60950-1 / IS 13252, IEC 60238, IEC 60745-1, IEC 60400, IEC 60730-1, IEC 61050, IEC 60320-1, IEC 61058-1, ASTM D 6194- 03 As per IEC 60695-2-10 (Glowing/hot-wire based test methods – Glow-wire apparatus and common test procedure), parts of solid insulating materials are ignited by glowing wires. A nickel/chromium wire is heated to 960°C and the insulating material is pushed against it with a force of 1 N. It is checked that the insulating material does not attain a certain temperature or catches fire so as to prevent fire hazard in their vicinity

GWT A5 (Automatic – Microcontroller based system)- In this variant, setting will be done through Microcontroller (MTCM Module)

Salient Features:

1. A motorized sliding carrier with an universally adjustable SS perforated tray is provided to mount the specimen.

2. Self adjusting current source to heat & maintain the glow wire to the preset temperature is provided.

3. The mounting jig can be moved forward or reverse with the help of a push button enabling ease of operation throughout the test.

4. Thyristor based proportional controller with ambient temperature compensation (100 deg. C min. ramp) is provided to get excellent control.

5. Precision scale is provided to measure the height of the flame.

6. Lamp Indications for Mains ON & Test ON.

7. Safety – Emergency Switch, MCB, Fuses.

8. External Calibration terminals for Temperature and Time.

9. Test Lock key switch to ON/OFF or avoid unauthorized person to operate the equipment.

10.Push buttons are provided to record the Ignition Time and Extinguish Time.

Specifications:

1.Input Supply: – 230 V AC, 50 Hz, 1 Phase, 500 VA.

2. Micro-controller based programmable controller (MTCM Module) – The setting of temperature (Ambient to 960 deg C) and time (0 to 99.9 sec) is through keypad.

3. Test Current: Between 120A to 150A

4. Temperature Sensor – Thermocouple: Fine wire of Cr/Al of 1 mm diameter

5. Seven Segment LED single display – For temperature and current indication.

6. Heating Element – Glow Wire: Nickel / Chromium (Ni/Cr-80:20) wire of 4 mm diameter with a shape as per the standard.

7. Penetration Depth: The limit of penetration of the glow wire is automatically restricted to7 mm.

8. Test specimens contact force against the glow wire is spring-loaded to 0.8 to 1.2N