1、 Different test objects
- Single piece testing machine：
- Only testingSingle wire or cableEvaluate its vertical combustion performance and self extinguishing ability under flame action.
- Applicable objects include single cables with a diameter of 1-30mm, such as plastic wires, control wires, elevator cables, and mining cables
.
- Bundle testing machine：
- TestingMultiple cables tied together into bundlesThe vertical combustion spread performance of the rear, simulating the risk of fire spread under dense laying conditions
. - Need a larger combustion chamber (such as 4.0m ³) to accommodate the wiring harness.
2、 Test purpose and strength difference
- Single test：
- Key evaluation of insulation materialsBasic flame retardancy(such as whether there is a risk of delayed combustion or droplet ignition)
. - Low flame intensity: use1kW spray gunThe flame height is about 148-208mm, and the flame application time can be set (usually ≤ 60 seconds)
.
- Bundle test：
- Simulate real firesThe fire spread along bundles of cablesThe scenario requires more stringent testing conditions
. - High flame intensity: using20.5kW spray gunBurning time up to 40 minutes
.
3、 Differences in equipment structure and parameters
| project | Single burning testing machine | Bundle combustion testing machine |
| Combustion chamber volume | About 1.0m ³ (such as 1050 × 650 × 1600mm)
| ≥ 4.0m ³ (larger space to accommodate wiring harness)
|
| Flame power | 1kW premixed flame
| 20.5kW high-intensity flame
|
| sample length | 600±25mm
| 3.5m (meets the requirement of bundle fixation)
|
| flow control | Gas (propane) 0.1-1L/min, air 0.1-1m ³/h
| High pressure air compressor (0.7MPa) is required
|
4、 Application scenarios and standards
- Single piece testing machine：
Suitable for quality control scenarios, such as basic flame retardant testing of household electrical cables, electronic instrument connecting wires, etc
, in accordance withGB/T 18380.11-2022 (Single Piece)TheIEC 60332-1
. - Bundle testing machine：
Used for mandatory certification (such as 3C certification) and high-risk areas (coal mines, ships), meetingGB/T 18380.31-2022 (Bundle)TheIEC 60332-3
.
5、 Basis for judgment of results
- Single testThe qualified standards are based on the combustion stop time (delayed combustion time ≤ 30 seconds) and combustion length (≤ 50mm at the top of the sample)
. - Bundle testBased on the flame spread height (≤ 2.5m) and carbonization range as the criteria for judgment
.
Two types of equipment complement each other: single piece testing to screen the basic flame retardancy of materials, bundle testing to verify the fire resistance level in actual installation environments
When selecting, the testing type should be matched according to the cable usage (such as ordinary electrical appliances vs. mines/ships) and certification requirements
1、 Different test objectsSingle strand testing machine: only tests the vertical combustion performance of a single wire or cable and evaluates its self extinguishing ability under flame action. Applicable objects include single cables with a diameter of 1-30mm, such as plastic wires, control wires, elevator cables, and mining cables. Bundle testing machine: tests the vertical combustion and spread performance of multiple cables bundled into bundles, simulating the risk of fire spread under dense laying conditions. A larger combustion chamber (such as 4.0m ³) is required to accommodate wiring harness 2. 2、 Test purpose and strength difference single test: Focus on evaluating the basic flame retardancy of insulation materials (such as whether there is flame retardancy and the risk of droplet ignition) 4 7. Low flame intensity: Using a 1kW blowtorch, the flame height is about 148-208mm, and the flame application time can be set (usually ≤ 60 seconds). Bundle test: Simulate the scenario of fire spreading along bundled cables in a real fire, with more stringent testing conditions. High flame intensity: Equipped with a 20.5kW blowtorch, it can burn for up to 40 minutes. 3、 Differences in equipment structure and parameters: Single combustion testing machine, bundle combustion testing machine, combustion chamber volume of about 1.0m ³ (such as 1050 × 650 × 1600mm), 3 8 ≥ 4.0m ³ (larger space to accommodate wiring harness), flame power of 1kW premixed flame, 2 520.5kW high-intensity flame, sample length of 600 ± 25mm, 2 63.5m (meeting bundle fixation requirements), flow control gas (propane) 0.1-1L/min, air 0.1-1m ³/h, 3 requiring high-pressure air compressor (0.7MPa), 4. Application scenarios and standards: Single testing machine: suitable for quality control scenarios, such as household electrical cables, electronic instrument connecting wires, etc. Basic flame retardant testing, in accordance with GB/T 18380.11-2022 (single), IEC 60332-1 2 4. Bundle testing machine: used for mandatory certification (such as 3C certification) and high-risk areas (coal mines, ships), meeting GB/T 18380.31-2022 (Bundle) and IEC 60332-3 2 7. 5、 The result judgment is based on the single test: the qualified standards are the combustion stop time (delayed combustion time ≤ 30 seconds) and combustion length (≤ 50mm at the top of the sample). Bundle test: Based on the flame spread height (≤ 2.5m) and carbonization range as the judgment criteria. The two types of equipment complement each other: single piece testing to screen the basic flame retardancy of materials, and bundle testing to verify the fire resistance level of 27 in actual installation environments. When selecting, the testing type should be matched according to the cable usage (such as ordinary electrical appliances vs. mines/ships) and certification requirements1、 Different test objectsSingle strand testing machine: only tests the vertical combustion performance of a single wire or cable and evaluates its self extinguishing ability under flame action. Applicable objects include single cables with a diameter of 1-30mm, such as plastic wires, control wires, elevator cables, and mining cables. Bundle testing machine: tests the vertical combustion and spread performance of multiple cables bundled into bundles, simulating the risk of fire spread under dense laying conditions. A larger combustion chamber (such as 4.0m ³) is required to accommodate wiring harness 2. 2、 Test purpose and strength difference single test: Focus on evaluating the basic flame retardancy of insulation materials (such as whether there is flame retardancy and the risk of droplet ignition) 4 7. Low flame intensity: Using a 1kW blowtorch, the flame height is about 148-208mm, and the flame application time can be set (usually ≤ 60 seconds). Bundle test: Simulate the scenario of fire spreading along bundled cables in a real fire, with more stringent testing conditions. High flame intensity: Equipped with a 20.5kW blowtorch, it can burn for up to 40 minutes. 3、 Differences in equipment structure and parameters: Single combustion testing machine, bundle combustion testing machine, combustion chamber volume of about 1.0m ³ (such as 1050 × 650 × 1600mm), 3 8 ≥ 4.0m ³ (larger space to accommodate wiring harness), flame power of 1kW premixed flame, 2 520.5kW high-intensity flame, sample length of 600 ± 25mm, 2 63.5m (meeting bundle fixation requirements), flow control gas (propane) 0.1-1L/min, air 0.1-1m ³/h, 3 requiring high-pressure air compressor (0.7MPa), 4. Application scenarios and standards: Single testing machine: suitable for quality control scenarios, such as household electrical cables, electronic instrument connecting wires, etc. Basic flame retardant testing, in accordance with GB/T 18380.11-2022 (single), IEC 60332-1 2 4. Bundle testing machine: used for mandatory certification (such as 3C certification) and high-risk areas (coal mines, ships), meeting GB/T 18380.31-2022 (Bundle) and IEC 60332-3 2 7. 5、 The result judgment is based on the single test: the qualified standards are the combustion stop time (delayed combustion time ≤ 30 seconds) and combustion length (≤ 50mm at the top of the sample). Bundle test: Based on the flame spread height (≤ 2.5m) and carbonization range as the judgment criteria. The two types of equipment complement each other: single piece testing to screen the basic flame retardancy of materials, and bundle testing to verify the fire resistance level of 27 in actual installation environments. When selecting, the testing type should be matched according to the cable usage (such as ordinary electrical appliances vs. mines/ships) and certification requirements