Impact, Vibration, Rain And Combustion Testing Machine Complies with the British fire-resistant cable standard BS6387

I. Overview:
The performance requirements of this testing machine include fire resistance test, water spray fire resistance test and mechanical fire resistance test. It is suitable for mineral insulated cables with a rated voltage not exceeding 450/750V, and can maintain circuit integrity for a relatively long time under flame conditions. Complies with the British fire-resistant cable standard BS6387 "Specification for Cable Performance Requirements for Maintaining Circuit Integrity in the Event of Fire"
Ii. Equipment Composition: Fire Resistance Test: The fire resistance test bench consists of the following parts
1.1: Cable support system: The cable is clamped horizontally at both ends of the cable sheath by clips. The middle part of the cable is composed of two metal rings (with an interval of 300mm, fixed, and grounded together with other metal parts of the device). The cable support device is shown in Figure 1. For armored cables with a diameter of less than 10mm or other cables that have undergone significant displacement during the test, three metal rings are provided, each fixed approximately 150mm away from the original metal ring.
1.2: Continuous detection device: During the test, let the current pass through all the cores of the cable.
A three-phase star-connected transformer or three single-phase transformers (or one single-phase transformer, if the test is a single-core cable), and have sufficient capacity to maintain the maximum allowable leakage current at 3A under the test voltage. Connect a lamp to each core wire at the other end of the cable and load a current of approximately 0.25A at the rated voltage of the cable 1.3: heat source
1.3.1: The heat is a 610-millimeter-long tubular gas burner that can force the supply of methane and has a dense flame. 1.3.2: Temperature measurement: A 2mm diameter armored thermometer is placed near the air inlet, 75mm parallel to the burner. 1.3.3: Test flame temperature and duration: (See BS6387 combustion grade)
A: 650℃±40℃-3 hours B: 750℃±40℃-3 hours C: 950℃±40℃-3 hours S: 950℃±40℃
-20 minutes
1.3.4: Sample: The sample is a section of the finished product, not less than 1200mm, with 100mm of the sheath and covering layer removed from each end. In the cable
The wires at both ends should be electrically connected.
Iii. Water and Fire Resistance Test: It includes the following parts
1.3.5: Test voltage: Adjustable from 200 to 1000V. See Figure 7
2.1: Cable support System: The cable is connected to a metal bracket composed of two 25mm wide rigid plates, and the bracket is fixed with metal clamps
The spacing is 200mm. The cables are connected to the brackets as shown in Figure 3, and all metal frames are grounded.
2.2: Continuous detection device: During the test, allow current to pass through all cores of the cable, three single-phase transformers, and have sufficient capacity to maintain the test voltage to reach the maximum allowable leakage current of 3A. Connect a lamp to each core wire at the other end of the cable and load a current close to 0.25A at the rated voltage of the cable.
2.3: Heat Source
2.3.1: Heat:
A strip-shaped burner with a length of 400mm can burn cable samples up to 400mm. The burner assembly can be adjusted to provide a bright flame with a temperature of 650 ° C to 40 ° C.
2.3.2: Temperature measurement: A 2mm diameter armored thermometer is placed on the lower surface of the cable
2.3.3: Test flame temperature: 650℃±40℃
2.3.4: Water Spraying: A nozzle, as shown in Figure 4, is installed on the test bracket, right in the middle of the burner, as shown in Figures 4 and 5. Spray 0.25 liters to 0.30 liters per square meter of water near the sample with a water pressure of 250KPa to 350KPa. This rate needs to be measured with a collection tray, which has sufficient depth to place its long axis parallel to the cable's axis and centered. This tray is approximately 100mm wide and 400mm long.
2.3.5: Sample: Samples larger than 1500mm are taken from finished products and have undergone bending tests at ambient temperature. Both ends are removed
A 100mm sheath and covering layer. The wires at both ends of the cable should be properly treated in accordance with the electrical connection and the manufacturer's recommendations
2.3.6: Test voltage: Adjustable from 200 to 1000V as shown in Figure 7
4. Resistance to mechanical vibration and fire: The test device includes the following parts as shown in Figure 5. Fix the components at the corresponding positions of the slotted frame.
3.1 The cable is fixed to a vertical wall and fastened to the steel plate with heat-resistant and non-combustible materials.
3.2 The transformer connects the fuse to the lamp to indicate that the circuit is continuous
3.3 Heat Source (same as refractory equipment) Test temperature selection: X: 650± 40℃, Y: 750±40℃, Z: 950±40℃
3.4: Vibration device: The vibration device consists of a low-carbon steel rod (diameter 25mm±5%, length 600mm±5%). The longitudinal section of this rod is parallel to the wall and 200mm higher than the top of the wall. An axis divides it into two parts, 200mm and 400mm, with the longer part facing the wall. After an interval of 30±2 seconds, it dropped from a position 60° horizontal to the middle of the wall, as shown in Figure 5.
3.5: Sample: The sample is a section of the cable not less than 1200mm, with 100mm of sheath and covering layer removed from each end. See Figure 6.
3.6: Test voltage: Adjustable from 200 to 1000V