GLOW WIRE APPARATUS
Manual Operation - Model GWT - 01
 
  
SCR ELEKTRONIKS have developed this GLOW - WIRE APPARATUS Model GWT - 01 to carry out Tests Specified in many Standards to Check the "Resistance to Fire" in the Moulded Insulator Material Parts of Electrical accessories, like Domestic Switches, MCB, ELCB, etc.

Testing of the Electro-technical products with regard to Fire Hazard is to create exactly the conditions occurring in practice. However, in most instances, this is not possible.

Thus, for practical purposes, the Testing of Electro-technical parts / products are Tested with regard to Fire Hazard by the simulating as closely as possible the actual effects occurring in practice.

This Test setup does create such " SIMULATION " as described in the respective IS Code :

IS 11000 (Part2/Sec 1) - 1984 & IEC PUB 695-2-1(1980), "Fire Hazard Testing - Glow Wire Test & Guidance" is applicable to switches for domestic & similar purposes as well as other electro-technical equipments.
  

FEATURES / SPECIFICATIONS
   
1. Heating Element - Glow - Wire : Nickel / Chromium ( Ni/Cr - 80:20 ) wire of 4 mm dia. with a shape as per Standard.

2. Temperature Sensor - Thermocouple : Fine Wire of Cr / Al of 0.5 mm dia. located in 0.6 mm dia. pocket hole in Glow - Wire, to measure Glow - Wire temperature. Sheath resistant to 1000 deg. C.

3. Temperature Control : Proportional Temperature controller - 3& 1/2 Digit, 1 deg. C resolution, with ambient temperature compensation, (200 deg. C per min. ramp).

4. Temperature Range : Adjustable up to 960 deg. C.

5. Time Controller :
                   a) Digital Preset Timer - 3 Digits, 0-99.9sec.
                   b) Digital Time Interval Meter - 0to 99.9 sec.

6. Carriage : A Mounting Tray, Universally adjustable SS Perforated Tray on a Trolley is provided to mount the Specimen.

7. Penetration Depth : Mechanically restricted to 7 mm only.

8. Sample Loading : Test Sample contact force against the GLOW-WIRE pre-loaded to 0.8 to 1.2 N.

9. Sample Size : 180 mm x 150mm max. & 15mm x 15mm min., Thickness 10 mm to 80 mm

10. Safety : Emergency Switch, MCB & Fuses.

11. Dimensions : 600 mm W x 300 mm D x 610 mm H, overall.

12. Supply : 230 V AC, 50 Hz, 1 Ph, 500 VA.
   

GLOW WIRE TEST APPARATUS
MODEL GWT - A1
GENERAL DESCRIPTION
 
SCR ELEKTRONIKS have developed GLOW - WIRE APPARATUS Model GWT - A1, which enables operator to carry out tests automatically as specified in many Standards to Check the "Resistance to Fire" in the Moulded Insulator Material Parts of Electrical accessories, such as Domestic Switches, MCB, MCCB, ELCB, Energy Meters etc.

Testing of the Electro-technical products with regard to Fire Hazard is to duplicate exactly the conditions occurring in practice. However, in most instances, this is not possible.

Thus, for practical purposes, the Testing of Electro-technical parts / products are Tested with regard to Fire Hazard by simulating as closely as possible the actual effects occurring in practice.

The Electro-technical parts / products which are exposed to Thermal Stresses due to electric effects & deterioration by which the safety of the product is not unduly affected by Heat generated within the product.

IS 11000 (Part2/Sec 1) - 1984 & IEC PUB 695-2-1(1980), "Fire Hazard Testing - Glow Wire Test & Guidance" is applicable to switches for domestic & similar purposes as well as other electro-technical equipments.
 

FEATURES
 
01. Nickel / Chromium ( Ni / Cr - 80 : 20 ) wire of 4 mm dia. with a shape as per Standard.

02. Fine Wire of Cr / Al of 0.5 mm dia. to measure Glow - Wire temperature. Sheath resistant to 1000 deg. C.

03. Micro controller base PID Temperature controller - 4 Digit with ambient temperature compensation.

04. Self adjusting current Source to heat & Maintain the Glow - Wire to the Pre-set Temperature.

05. Temperature Ramp - up is controlled to 200 deg. C per minute.

06. Motorised Sliding Carrier preloaded with force of 0.8 to 1.2 N when the part / product is in contact with the Glow - Wire.

07. Automatic Setting of limit of the penetration of Glow - Wire in the sample by 7 mm.

08. Micro controller base Digital Timer - The Timer indicates
                      a) Glow - Wire application time.
                      b) Test Duration.
                      c) Flame time.

09. Mounting Tray - Universally adjustable Stainless Steel Perforated Tray on a Trolley is provided to mount the specimen.

10. Precision Scale - The height of the Flame is measured by this Scale.
  

SPECIFICATIONS

01. Heating Element - Glow - Wire : Nickel / Chromium ( Ni / Cr - 80 : 20 ) wire of 4 mm dia. with a shape as per Standard.

02. Temperature Sensor - Thermocouple - Fine Wire of Cr / Al of 0.5 mm dia. located in 0.6 mm dia. pocket hole in Glow - Wire, to measure Glow - Wire temperature. Sheath resistant to 1000 deg. C.

03. Temperature Control - Micro controller based PID Temperature controller - 4 Digit, 1 deg. C resolution, with ambient temperature compensation, (200 deg. C per min. ramp).

04. Temperature Range - Adjustable up to 960 deg. C.

05. Time Controller - Micro controller based timer, 4 digit to measure :

                              t01 = Glow wire application, 30 sec.
                             t02 = Test duration, 60 sec.
                             t03 = Time when sample STARTS burning.
                             t04 = Time when sample STOPS burning.

06. Carriage - Motorised for movement of mounting tray.

07. Mounting Tray - Universally adjustable Stainless Steel Perforated Tray on a Trolley is provided to mount the specimen.

08. Penetration Depth - Mechanically restricted to 7 mm only.

09. Sample Loading - Test Sample contact force, against the GLOW - WIRE pre-loaded to 0.8 to 1.2 N.

10. Sample Size - 180 mm x 150mm max. & 15mm x 15mm min., Thickness 10 mm to 80 mm

11. Safety - Emergency Switch, MCB & Fuses.

12. Dimensions - 600 mm W x 300 mm D x 610 mm H, overall.

13. Supply - 230 V AC, 50 Hz, 1 Ph, 500 VA.