Download of CatalogsWoer works continually to improve the products quality and environment, which are its important and self-evident parts of the strategic plan. Here are the certifications:
- ISO 9001 Quality standard
- ISO 14001 Environmental standard
STANDARDS
Definition of Voltages.-
Cable accessories are classified according to the voltages at which they operate. IEC designations give a clear picture of used vocabulary. The voltages normally used in this context are:
U0 = the rated r.m.s. (root mean square) power-frequency voltage between each conductor and screen or sheath for which cable accesories are designed,
U = the rated r.m.s. power-frequency voltage between two different conductors for which cable accesories are designed,
Um = the maximum r.m.s. power-frequency voltage between two different conductors for which cable accesories are designed, It is the highest voltage that can be sustained under normal operating conditions at any time at any point in the system. It excludes temporary voltage variations due to fault conditions and the sudden connection of large loads.
Standards and type testing.-
Electrical components must meet numerous requirements in areas such as functional safety, technical performance, personal safety and so on. For cable accessories, compliance with the quality requirements is checked by type and routine testing. Woer performs these test to various standards, both international and national
These are the standards in which the tests are based,
IEC (International Electrotechnical Commision): An international standard.
IEEE (Institute of Electronics and Electrical Engineers): The standard is mainly used in the USA.
GB/T 12706/4: These standards are the national standards in China. In most cases, the standards harmonize with IEC standards, and there may be some special requirements.
Voltage range Um 1.2 kV.-
In this voltage range, the function of the electric accessories is to provide mechanical protection and insulation. There is no need for controlling the electrical field.
Voltage range Um 3.6 - 36 kV.-
IEC: Current standards are IEC 61442, which covers test methods, and IEC 60502-4, which sets out the testing requirements.
| Voltage Classes (kV) | ||
| U0 | U | Um |
| 1.8 | 3 | 3.6 |
| 3.6 | 6 | 7.2 |
| 6 | 10 | 12 |
| 8.7 | 15 | 17.5 |
| 12 | 20 | 24 |
| 18 | 30 | 36 |
| 19 | 33 | 36 |
| 36 | 66 | 72.5 |
| 64 | 110 | 136 |
Test report for 8.7/15 KV Outdoor Heat Shrinkable Termination.-
Test report for 8.7/15 KV Heat Shrinkable Joint.-
Test report for 8.7/15 KV Indoor Cold Shrinkable Termination.-
Test report for 8.7/15 KV Cold Shrinkable Joint.-
Test report for 19/33V Indoor Cold Shrinkable Termination.-
Test report for 19/33V Outdoor Cold Shrinkable Termination.-
Test report for 19/33V Outdoor Cold Shrinkable Joint.-
Performance of WOER Cold Shrink Cable Accessories
When tested according to IEC 60502-4
| SEQ. | Test Project | Requirement acc. to IEC 60502-4 | Result | ||
| 18/30 kV (36) | 12/20 kV (24) | 6/10 kV (12) | |||
| 1 | AC voltage (in air and ambient temperature) | AC for 5 min. at 81 kV: no breakdown, no flashover | AC for 5 min. at 54 kV: no breakdown, no flashover | AC for 5 min. at 27 kV: no breakdown, no flashover | PASS |
| 2 | Partial discharge test | ≤ 10 pc at 30 kV | ≤ 10 pc at 20 kV | ≤ 10 pc at 10 kV | PASS |
| 3 | Impulse test | 10 impulses for each polarity at 170 kV | 10 impulses for each polarity at 125 kV | 10 impulses for each polarity at 75 kV | PASS |
| 4 | Heating cycle in air (for termination) | 60 cycles at 95 oC~100 oC and 45 kV in air, no breakdown | 60 cycles at 95 oC~100 oC and 30 kV in air, no breakdown | 60 cycles at 95 oC~100 oC and 15 kV in air, no breakdown | PASS |
| 5 | Heating cycle in air (for joints) | 30 cycles at 95 oC~100 oC and 45 kV in air, no breakdown | 30 cycles at 95 oC~100 oC and 30 kV in air, no breakdown | 30 cycles at 95 oC~100 oC and 15 kV in air, no breakdown | PASS |
| 6 | Heating cycle voltage test under water | 30 cycles at 95 oC~100 oC and 45 kV under water, no breakdown | 30 cycles at 95 oC~100 oC and 30 kV under water, no breakdown | 30 cycles at 95 oC~100 oC and 15 kV under water, no breakdown | PASS |
| 7 | Themal shorcircuit (screen) | no visible deterioration at current 1.97 kA for 2 s | no visible deterioration at current 1.97 kA for 2 s | no visible deterioration at current 1.97 kA for 2 s | PASS |
| 8 | Themal shorcircuit (conductor) | no visible deterioration at current 3.0 kA for 1 s | no visible deterioration at current 3.0 kA for 1 s | no visible deterioration at current 3.0 kA for 1 s | PASS |
| 9 | Dynamic shortcircuit | no visible deterioration at current 23.0 kA for 2 s | no visible deterioration at current 23.0 kA for 2 s | no visible deterioration at current 23.0 kA for 2 s | PASS |
| 10 | AC voltage for 15 min | AC for 15 min at 45 kV: no breakdown, no flashover | AC for 15 min at 30 kV: no breakdown, no flashover | AC for 15 min at 15 kV: no breakdown, no flashover | PASS |
| 11 | Salt fog (for outdoor terminations only) | 1000H at 22.5 kV: no breakdown, no flashover | 1000H at 15 kV: no breakdown, no flashover | 1000H at 7.5 kV: no breakdown, no flashover | PASS |
| 12 | Humidyty (for indoor terminations only) | 300H at 22.5 kV: no breakdown, no flashover | 300H at 15 kV: no breakdown, no flashover | 300H at 7.5 kV: no breakdown, no flashover | PASS |
Cables and Wires
Heat Shrinkable Tubing->
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