Engines EDKRV250M4
EDKRV250M4 asynchronous motors are designed to operate from an alternating current network with a frequency of 50 Hz with isolated neutral of coal mines and mines, dangerous due to the content of mine gas (methane) and (or) coal dust as a drive for mine scraper and belt conveyors, mechanized fasteners, loaders and combine harvesters, as well as drives of other mechanisms and machines with similar modes of operation. Nominal values of the main engine parameters in the S1 mode according to DSTU IES 60034-1 are given in the table.
The stator winding can be made of a rigid copper busbar, rotor – aluminum or copper-brass casting.
It is allowed to operate engines in mode S2 = 60 min, S3, S4 – 60% with the inertia factor F = 2 and frequency of inclusions to 30 included per hour, at the same time, the permissible power value is no more, specified for mode S1.
Explosion protection level of engines "explosion-proof" with types of explosion protection "explosion-proof shell" and "intrinsically safe electrical circuit" RV Ex d b I Mb:
Degree of protection of motors and input boxes IR55, external fan IR20 according to GOST 17494.2.6 (Jesus 60529).
Type of climatic execution of engines – U2.5;
Execution of engines according to the method of installation - IM1001, IM4001(V5) (flanged), IM9701(V35) (foot/flange) according to GOST 2479.
Method of cooling engines – Jesus 0141 according to GOST 20459.
MAIN TECHNICAL INDICATORS
| Engine parameters | Value |
| Capacity, kW | 55 |
| Rotational frequency, rpm | 1480 |
| Nominal voltage, AT | 660/1140 |
| Nominal current, A | 59,4/34,3 |
| efficiency, % | 93 |
| Power factor, cosφ | 0,87 |
| Mpusk/Mnom | 2,4 |
| Mmah/Mnom | 2,8 |
| Admission/Inom | 6,6 |
| Insulation class | N |
| Mass, kg | 540 |
OVERALL AND CONNECTING DIMENSIONS OF THE EDKRV250M4 ENGINE
