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Relaying - Bulgaria

Bulgaria
  1. MMOTORS JSC

    Bulgaria

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    MMOTORS is a Bulgarian company was founded in 1961 under the name “Micromotors”, engaged with manufacturing activities in five divisions: •Induction electric motors; •Axial fans; •Heat recovery ventilation systems; •Aluminum foundry; •Plastic forming. The induction electric motors MA, MAL, MAT, MR and MRS series are designed for general purposes. They are self-ventilated, the frame size 56mm, 63mm, 71mm, 80mm, 90mm, 100mm, 112mm and 132mm. The series are designated as follows: - MA series – three-phase induction motors. - MAL series – lifting three-phase induction hoisting motors. - MAT series – trolley three-phase induction motors with break. - MR series – single-phase induction motors with running capacitor. - MRS series – single-phase induction motors with running and starting capacitors. BASIC CHARACTERISTICS: Power supply: -three-phase: 400/230 V – 50Hz. -single-phase: 220-240V / 50Hz. Design for other voltage and frequencies is possible : -Protection Degree: IP 54 / IP 55 -Insulation Class: “F” -Standard forms: B3, B5, B14, B3/B5 and B3/B14. OPERATING CONDITIONS: The motors are designed to operate in Temperate Climate (Class “N”) at temperatures from -25oC to + 40oC, maximum altitude (above sea level) 1000m, and maximum relative humidity 85%. Standards: IEC: 60034-5: 2007; 60034-1: 2010; 1143: 1985; 10881-85. The axial fans are divided into a few sections: •Elegant & Stylish •Standard •Industrial •High temperature •Heat recovery ventilation systems

  2. PSS BULGARIA LTD.

    Bulgaria

    CONSULTING AND SERVICES - Consultation of investor and proposition of the best technical and economically best solution; - Calculation of power flows and voltage drops in HV and MV cable and overhead lines; - Calculation of harmonic components of the current and voltage in case of short circuit; - Short circuit current calculations in MV and HV networks; - Dimensioning of MV and HV power cables; - Analysis of electromagnetic transients and electromagnetic processes; - Analysis of overvoltages and selection of serge arrestors; - Calculation of relay protection settings; DESIGN Complete elaboration of conceptual, technical and detail design projects accompanied with all necessary calculations, specifications, thorough drawings, cross sections and as build documentation for: - Electrical transmission and distribution substations; - Conventional power plants; - Overhead transmission lines and cable transmission lines for low, middle and high voltage; - Industrial and generation plants; ENGINEERING - Project management; - Delivery and installation of electrical equipment in low, middle and high voltage installations; - Delivery and installation of high voltage and control cables; - Assembly and installation of relay protections cabinets, distribution and command cabinets; - Programming and setting of protection relays and SCADA; - Commissioning.