Power Electronics Measurement Laboratory

(1) Surge Testing carried out in SLAB accredited test facility

1.1 Surge Immunity Testing of Electrical Appliances

As per: IEC 61000-4-5

   

 

Testing of equipment/devices for surge immunity

  • Testing a single mode at 0, 90, 180 and 270 deg, for a single test level
  • Testing for modes, L-N, L-E, N-E at 0, 90, 180 and 270 deg, for a single test
  • Testing for modes, L-N, L-E, N-E at 0, 90, 180 and 270 deg, for 4 test levels

1.2 Testing of Surge Protective Devices

As per: SLS 1099-1: 2011 (IEC 61008-1:2010) and IEC 60898 – 1:2002

 

   
  

 

  • Measurement of Limiting Voltage of Surge Protective Devices (SPDs) Connected to Low Voltage Power Distribution Systems as per Testing Methods Specified in IEC 61643-11:
  • Measurement of Limiting Voltage of Surge Protective Devices (SPDs) Connected to Telecommunication and Signaling Networks
  • Measurement of Impulse-limiting voltage as per IEC 61643-21 with 1.2/50 us, 8/20 us combination waveform, 5 pulses from each
(2) Performance testing of RCCBs/MCBs

As per: SLS 1099-1: 2011 (IEC 61008-1:2010) and IEC 60898 – 1:2002

 

RCCB Testing (IEC 61008 – 1 : 2010)
No Test Clause
1 Test of indelibility of marking 6.0/9.3
2 Test of clearances and creepage distances 8.1.3
3 Test of reliability of screws, current-carrying parts and connections 9.4
4 Tests of reliability of screw-type terminals for external copper conductors 9.5
5 Test of resistance to heat 9.13.1
6 Test of dielectric properties 9.7
7 Test of temperature-rise 9.8
8 Test of operating characteristic 9.9
9 Test of trip-free mechanism 9.15
10 Test of operation of the test device at the limits of rated voltage 9.16
11 Test of behavior of RCCBs in case of an earth fault current comprising a dc component 9.21
12 Test of mechanical and electrical endurance 9.10
13 Test of resistance of the insulation against an impulse voltage 9.20
14 Reliability(Test with temperature of 40ºC) 9.22.2

 

 

MCB Testing (IEC 60898 – 1 : 2002)
No Test Clause
1 Test of indelibility of marking 6.0/9.3
2 Test of clearances and creepage distances 8.1.3
3 Test of reliability of screws, current-carrying parts and connections 9.4
4 Tests of reliability of screw-type terminals for external copper conductors 9.5
5 Test of resistance to heat 9.14.1
6 Test of dielectric properties and isolating capability 9.7
7 Test of temperature-rise and measurement of power loss 9.8
8 28-day test 9.9
9 Test of mechanical and electrical endurance 9.10
10 Test of tripping characteristic 9.11

 

(3) Performance testing of switches/Plugs/ Socket-outlets/Socket-outlet adaptors

As per;

  • Testing of switches – SLS 1000: 1993l
  • Fused plugs and switched and unswitched socket outlets – SLS 734:1996:13A
  • Three pin plugs, socket-outlets and socket -outlet adaptors (5A/15A) – SLS 948: PART 3: 1991

 

 

Switches Testing (SLS 1000:1993)
Item Test name Ref:
SLS 1000 Part 1 SLS 1000 Part 2
1 Construction 6.2 4.1
2 Dimensions 6.3
3 Accessibility of live parts 6.4 4.2
4 Provision for earthing 6.5 4.3
5 Terminals 6.6 4.4
6 Mechanism 6.7 4.5
7 Screws, current-carrying parts and connections 6.8 4.6
8 Resistance to ageing & to harmful ingress of humidity 6.9 4.7
9 Insulation resistance(IR) and electric strength 6.10 4.8
10 Temperature rise 6.11 4.9
11 Making and breaking capacity 6.12 4.9
4.7.1/ 4.7.2
12 Normal operation 6.13 4.10
13 Resistance to heat 6.15 4.12.1/ 4.12.2/ 4.12.3
14 Creepage distance, clearances and distances through sealing compound 6.16 4.13
15 Marking 7 4.16

 

 

Socket outlets Testing (SLS 734 : 1996)/13A
No Test Clause
1 Marking and Labeling 7.1 ~ 7.6
2 Creepage distances, clearances and distances through insulation 9.1
3 Provision for earthing 11
4 Terminals and terminations 12
5 Construction of socket-outlet 14
6 Resistance to ageing and humidity 15
7 Insulation resistance and Electric strength 16
8 Temperature rise 17
9 Breaking Capacity of socket-outlets 18
10 Normal Operation of socket-outlets 19
Shutter Endurance 19.1.2
Shutter Endurance 19.1.3
11 Resistance to heat 23

 

 

Three pin plugs, Socket outlets and Socket outlet adaptors (5A/15A) (SLS 948 : Part 3 : 1991)
Item Test Clause
Part 3 Part 1
1 Engagement of pins and contacts 4.2 4.5
2 Clearance and Creepage 4.3 4.8
3 Marking 4.6/11 8.2
4 Effectiveness of contacts
*Test condition : (Vdrop < 60mV)
4.8 9.2
5 Insulation resistance 4.9 9.4
6 High-Voltage test 4.10 9.5
7 Current breaking capability 4.11 9.6
8 Terminals 5 4.8
.6.2
9 Precautions against reversal of polarity 6
10 Switch action 7 9.6
11 Temperature rise *Test condition : (T < 35°C) 8
12 Electrical endurance of switches 9
13 Earthing of exposed metal parts 6.15 4.7
14 Socket contacts 6.16 6.1
15 Separation of terminals and conductors 7 6.3
16 Position of fixing holes 7 6.5
17 shutters 7 9.8

 

 

Plugs Testing (SLS 734 : 1996)/13A
No Test Clause
1 Marking and Labeling 7
7.1~7.6
2 Creepage distances, clearances and distances through insulation 9
3 Provision for earthing 11 11.2.1/b/ii
4 Terminals and terminations 12
5 Construction of plugs 13
6 Resistance to ageing and humidity 15
7 Insulation resistance and Electric strength 16
8 Temperature rise 17
9 Connection of flexible cords and cord anchorage 20
10 Resistance to heat 23

 

 

Plugs Testing (SLS 948 : 1991)
No Test Clause
Part 3 Part 1
1 Engagement of pins and contacts 4.2 4.5
2 Clearance and Creepage 4.3 4.8
3 Marking 4.6/11 8.1
4 Effectiveness of contacts *Test condition : (Vdrop < 60mV) 4.8 9.2
5 Insulation resistance 4.9 9.4
6 High-Voltage test 4.10 9.5
7 Current breaking capability 4.11 9.6
8 Terminals 5 4.8
6.2
9 Precautions against reversal of polarity 6
10 Switch action 7 9.6
11 Temperature rise *Test condition : (T < 35°C) 8 9.7
12 Electrical endurance of switches 9
13 Earthing of exposed metal parts 4.7
14 Special requirements for plugs 5

 

(4) Safety Testing of Electrical Equipment and Surge Protective Devices

As per

IEC 60335-1: Safety of Household and Similar Electrical Appliances such as coffee machines, dish washers, washing Machines.
IEC 60598-1: Safety of Lighting Equipment such as lamp holders, lights, fluorescent lights, sodium lights, electronic ballasts.
IEC 60950-1: Safety of Information Technology Equipment Such as typewrites, erasers, accounting machines, modems, telephone answering machines.
IEC 61010-1: Safety for Electrical Equipment for Measurement, Control and Laboratory use such as regulation equipment, measuring equipment, electrical equipment for laboratories, safety testers.
IEC 61643-1: Low voltage surge protective devices Surge protective devices connected to low-voltage power distribution systems – Requirements and tests
  

 

  • HI-Pot/Dielectric Strength / Dielectric withstand Test(AC or DC)
  • Insulation Resistance
  • Ground Bond
(5) Performance Testing of Batteries

As per: IEC 60095-1/ SLS 1126

 

Tests carried out

  1. Marking
  2. Acceptance
  3. Retention
  4. Capacity
    • Reserve
    • Effective
(6) Performance testing of Cables

As per : SLS 733:2005, SLS 695:2007, SLS 1143:2008

  • Conductor resistance
  • Voltage test on completed cable
  • Voltage test on cores
  • Insulation resistance