Punto di misura commerciale dell'energia elettrica PKU 6 (10) "Contatto"

Point of commercial accounting of electricity type PKU-6 (10) -K (M) "Contact" is intended: * to measure and record the active and reactive energy of direct and reverse directions in AC circuits with voltage of 6kV or 10kV, frequency 50 Hz, * for use as part of automated control and metering systems (AMR) for transferring measured and calculated parameters to the control room for monitoring, metering and distribution of electrical energy. Two main types of certified PKU are produced: 1. PKU-6 (10) "Contact", execution in one iron monoblock case 2. PKU-6 (10) -K ‛Contact‛, version in three composite housings separately for each phase PKU-6 (10) -K ‛Contact‛ consists of three composite blocks, with current and voltage transformers, separated in phases. Accounting and data transfer systems are located in a plastic waterproof case installed, in turn, in a metal vandal-proof case. During the transportation and installation the crane equipment is not required. The location of the three blocks around the support allows you to evenly distribute the load and use only one support for installation. The large distance between the blocks reduces the likelihood of interfacial closures. Block bodies are not subject to corrosion. For all the time of operation, staining of blocks is not required, the operating temperature range is from -50 ºС to + 98ºС. The warranty for the composite case is 25 years, for components - according to the guarantees of the manufacturers. Each type of PKU can be manufactured in two versions: 1. With current transformers of type TOL and voltage transformers of type ZNOLPM-6 (10) with built-in fuses. According to the recommendations of the Sverdlovsk Plant of Current Transformers, in order to increase the resistance to ferroresonance, a 25-ohm resistor, designed for a continuous 4 A current (four parallel-connected resistors of 100 A), must be included in the additional windings connected to an open triangle. Ohms and power 100 watts each). The operation of a PKU with this technical solution revealed a number of shortcomings, such as overheating and destruction of resistors during long-term single-phase earth faults (OZZ) in networks of 6 (10) kV with an insulated or effectively grounded neutral. The specialists of Contact Volga LLC have developed and put into operation a cardinally new resistor AR 25-0.5 "Contact" UHL1, which can withstand unlimited time the effects of unbalance current flowing through the resistor and secondary secondary windings of voltage transformers 3хННОЛПМ-6 (10) included “open triangle” in the case of single-phase earth faults (OZZ) in networks of 6-10 kV with an insulated or effectively grounded neutral. 2. With current transformers of type TOL and voltage transformers of type NALI-SESCH-6 (10). As a protection against the development of ferroresonant processes and the failure of protective safety devices (spare parts), this transformer uses a zero-sequence transformer connected to the gap between the common connection point of the primary windings of the voltage transformers in the star and the ground. This item of commercial accounting is implemented in three composite cases of slightly larger size than with ZNOLPM transformers, with a 2TT + 3TN connection circuit (NALI-SESCH). The RZIA unit is placed in a separate plastic case, together with a metering cabinet, to enable visual monitoring of the relay protection against ferroresonant processes. This project is at the final stage of development and certification. Contents of delivery: * high-voltage measuring module (BBM) * antiresonant resistor * frame for mounting the BBM on the support * low-voltage module of accounting, data collection and transmission (NVM) * frame for mounting NVM on the support * connecting cable and cable box * surge suppressors * frame for mounting the arrester on the support * RLND disconnector * frame for mounting RLND on the support * high voltage test protocol * set of technical documentation