REN2ST
Test stand REN2ST
Test stand REN2ST of generators, motor-wheel units and electrical equipment of railway vehicles
The test stand is designed to control the electrical equipment drive motor speed in accordance to the required technological modes and methods of testing.
The stations are based on specialized frequency inverters (FC), performed on the bipolar voltage inverter (IGBT) and equipped with a microprocessor controller.
REN2ST – control station.
DM – drive motor.
G – generator.
Figure1 - Functional chart of REN2ST switching on for test stand of motor wheel unit cranking.
Performance of motor-wheel unit cranking:
• Minimum engine acceleration and braking – 0,1 Hz/s.
• Maximum engine acceleration and braking are defined by the current capacity of the station and engine, maximim 50 Hz/s.
• Engine shutdown – normal braking, by gradual decreasing of input frequency or dynamic braking (drag brake).
Control:
1) Directly from the built-in remote control.
2) Remotely via the remote panel (PC, Notebook).
3) With quantized input signals.
The station provides a smooth transition to a given fixed frequency by the following commands:
At the command «Start – frequency 1» frequency inverter (FI) jumps to the output frequency 1, given in the memory of FI with given speed. If the voltage was not applied to the motor, this command is equivalent to the command «Start» with acceleration up to frequency 1. If FI was working with frequency 2 (more than frequency 1), when the command «Start – frequency 1» is issued, the FI is slowing down to frequency 1 with given speed. At the command «Stop» the voltage of the motor is removed or the smooth decrease in frequency at the output of the FI to zero is performed.
Diagrammatic work of electric drive.
Figure 2. Example of diagrammatic work of REN2ST.
Acceleration time Tр is defined as Tр=(f2-f1)/temp, where f1 and f2 – frequency 1 and frequency 2 accordingly; temp –frequency drift (for acceleration and breaking is set separately).
Relay output signals of FI: «Accident», «Output voltage of FI».
Station’s settings adjustment is performed by using the integrated control panel with the stopped drive motor off.
General technical data
Rated input voltage: three-phase ~ 3×380V, 50Hz
Input voltage tolerance +10%Uном; -15%Uном
Rated output voltage: three-phase ~3×(0…380)V; ~ 3×(0…220)В
Output frequency 0…50Hz (up to 200Hz)
Depth of regulation 1:20
Rated output current from 10 А to 630 А
Sinusoidal output current
Overload capacity from 1,1×Iн
Minimum efficiency 0,95
Minimum input power factor 0,95…0,97
Input signals 1-2 analog, 6 relay
Output signals 3 relay
Continuous running duty, intermittent periodic duty
Category temperature range +1…+40°С
Climatic version according to GOST 15150-69 UHL
Placement category according to GOST 15150-69 4
Ingress protection rating according to GOST 14254-80 IP21
Signalling and display:
• Continuous display on the integeral (or remote) panel the main working conditions of the test base (output frequency, load current output, voltage, power).
• Station’s status indication.
• Shutdown alarm.
• Forced outage diagnostics with display and rote of the reasons for 5 recent disconnections.
Electic drive protection, provided by the station:
• Motor overload protection.
• Current open phase protection.
• Short circuit protection.
• Short circuit in power section protection.
• Protection from inappropriate voltage reduction or voltage overloading.
• Power section overheating protection.
• Control system and power section faults protection.
Introduction
Control stations are introduced and operate at the enterprises in Russia and Ukraine:
• OJSC "Tver Wagon Works" (Tver) Russia;
• Wagon depot «Kiev - Passenger» (Kiev) Ukraine;
• Kharkov Wagon Works (Kharkov) Ukraine;
• Research and production complex «Dnepropetrovsk Electric Locomotive Plant» (Dnepropetrovsk) Ukraine.
With our products you also get
• Service warranty.
• Post warranty service and supply of spare parts.
• Technical support from our designers and manufacturers.
We would welcome your inquiries!