PX series general power line frame (cabinet)
　　 The PX series general power line frame (cabinet) manufactured in our company includes PXK and PXG models to meet the specific requirements of the customers. It includes distribution line frame and distribution line cabinet according to its installation and capacity for user’s option.
　　Distribution line frame (cabinet) is a connecting equipment between large-capacity telephone exchange and incoming cables. It consists of longitudinal security arrangement, horizontal test array, security unit and alarm device, and has follow-up conduct line and protection communication equipment and test as well as other functions.
Main characteristics ：
　　 Both the clip type and wiring connection type have reliable contact for follow up and maintains air-tightness and convenient operation. The clip type is characterized with one-time completion for clip connection, while wiring connection type adopts electrical wiring connection.
　　 It has overload protection, strong current protection, safety and reliability, convenient test and measuring, and visible and audible alarming devices. The plastics is of self extinguishing materials with the fire retardant performance up to BG4609-86 FV-0.。
Major technical data ：
Service conditions:　Temperature 5-40℃
　　　　　　　　　　Relative temperature≤85%(+30℃)
　　　　　　　　　　Atmospheric pressure 70-106KPa
Technical data:
　　sub-voltage breakdown voltage 190-260V
　　Pulse breakdown voltage Umax≤800V (at 1000V/US voltage growing rate)
　　Withstand pulse current capability 100A, 300 times (10/1000US)
　　Withstand AC capacity 5A 5times (continued electrical connection 1 S)
　　DC resistance at room temperature ≤22mΩ(15-25℃), T.R. resistance difference between lines ≤2mΩ
　　No action current 100Ma 1 hour no action (test voltage 600VDC, ambient temperature 40℃)
　　Electrical supply loss protection: when electrical discharge has reached 2.5Ar.m.s, the T.R. line in the discharge circuit shall have ground connection within 15s.

Operating current 　Time 　 Time(PTC) 　500mA 　20s 　2min 　700mA 　5s 　2min 　1A 　1.5s 　2min 　2A 　0.5s 　2min 　3A 　0.2s 　2min