RTR Energia 12kVAr Bedienungsanleitung
RTR ENERGÍA, S.L.
Pol. Ind. Pinto – Estación
28320 Pinto (Madrid) – ESPAÑA
Tel.: (+3 ) 916 916 612 Fax: (+3 ) 916 912 257
Microprocessor-Controlled Capacitor
Switching Thyristor Mod les
Technical User’s
Man al
Date: 08/11/2016
Version: 4
TECHNICAL USER´S MANUAL
1
Thyristor modules
WARNINGS & SAFETY PRECAUTIONS
•Check your power cables and connections for damage before powering up the module. If
the cables are damaged, do not power it up.
•Power cables should not pass over the module.
•To replace the module, the power must be switched off and capacitors must be
completely discharged.
•Do not exceed the nominal ratings specified in the technical specifications.
•Do not touch the modules with bare and/or wet hands while it is on.
•Make sure that the power is turned off when cleaning. Use a dry cloth to clean the
module.
•Do not operate the module under or above the specified voltage ratings.
•The module must be vertically mounted on the mounting plate.
•Check cabling and connections before powering up.
Ca tion: Life-threathening voltage levels may remain in the capacitors long after
the power is switched off. Make s re capacitors are completely discharged
before to ching the mod le.
TECHNICAL USER´S MANUAL
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Thyristor modules
Table of Contents
Warnings and Safety Preca tions………………….…………………..………..
Table of Contents……………………………………….…………………………….…
1Introd ction………………………………………….……………………….……..
1.1 General Description……………………………………….………
1.2 Application Areas….……………………………………..……….
2Technical Specifications……………………………………………………….
3Set p……..……………………………………………………………..……......….
3.1 Prerequisites for Setup…….………………...…………………
3.2 Installation………………….………………….……..……………..
3.3 Wiring Diagrams..................………….………………………
3. Ready for Start Up…………………………………………………
3.5 Alarms and Indicators……………………….…………………..
4Technical Drawings……………………………………………..………...……
5Tro bleshooting……………………………………………………..……………
6Warranty, Terms and Conditions………...………………………………
7Contact Information…………..………………………………………………...
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TECHNICAL USER´S MANUAL
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Thyristor modules
1 – Introd ction
1.1 General Description
Thyristor modules are designed to switch capacitive loads up to 80kVAr in power factor
correction (PFC) applications. The modules can switch capacitive loads within 10ms of receiving
a triggering signal. The microprocessor-based architecture and its algorithm senses the voltage
zero crossing, thereby avoiding capacitor abrasion. The modules can switch up to 80V, star- or
delta-connected symmetrical or asymmetrical, resistive, inductive and capacitive loads during
the voltage-zero crossing. Triggering is easily performed through power factor correction relays,
or PLCs. The advantages of the thyristor modules over state-of-the-art mechanical contactors
include: (1) longer life expectancy, (2) fast switching performance, (3) guaranteed minimal
voltage or current transients during switching which ( ) extends the capacitor lifetime. Thyristor
modules monitor voltage, status and, temperature. Detected faults are displayed on the four
LEDs on the front panel and recorded in the module internal memory. The modules can operate
with or without a detuned filter reactor. The modules protect detuned filter reactors against
overheating through their external thermostat connections. Thyristor modules are maintenance
free and quiet.
1.2 Application Areas
Thyristor modules are designed for dynamic power factor correction applications requiring
extremely fast and frequent switching actions. Applications include, but are not limited to,
welding, presses, elevators, cranes, arc furnaces, wind turbines and similar areas with
dynamically varying loads.
2 – Technical Specifications
Technical specifications of the 12kVAr, 25kVAr, 50kVAr and 80kVAr thyristor modules are
listed in Table 2.1. This table gives guaranteed ratings and exceeding these guaranteed ratings
will significantly reduce module life expectancy.
Table 2.1: Technical specifications for 12kVAr, 25kVAr, 50kVAr, and 80kVAr
Parameter Units 12kVAr 25kVAr 50kVAr 80kVAr
Nominal Voltage V 00 ±%1 00 ±%1 00 ±%1 00 ±%1
Maximum Blocking Voltage V 1600 1600 1600 1600
Maximum Operating
Current A 20 0 80 115
Maximum di/dt A/µs 50 100 1 0 1 0
Conductor Cross Section mm
2
16 16 35 35
Number of Semicoductor
Modules - 2 2 2 2
Auxiliary Supply Voltage V - - 230±%10 230±%10
Fan Power Rating VA - - 32 32
TECHNICAL USER´S MANUAL
Thyristor modules
Auxiliary Supply Conductor
Cross Section mm
2
- - 2.5 2.5
Fan Activation
Temperature ºC - - 50 50
Triggering Voltage/Current V/mA 2 /10 2 /10 2 /10 2 /10
Triggering Conductor Cross
Section mm
2
2.5 2.5 2.5 2.5
Overheating Protection ºC 90±5 90±5 90±5 90±5
IP Class - 20 20 20 20
Ambient Temperature
-Operating (Full Load)
-Operating (%75 Load)
-Storage
ºC
ºC
ºC
-20~ 5
-20~60
- 0~100
-20~ 5
-20~60
- 0~100
-20~ 5
-20~60
- 0~100
-20~ 5
-20~60
- 0~100
Relative Humidity % 5~95 5~95 5~95 5~95
Size (W x D x H) mm 158x15 x115 158x15 x115 161x229x197.5 161x229x197.5
Weight kg / lb 2.2 / .9 2.2 / .9 5.9 / 13.0 5.9 / 13.0
3 – Set p
3.1 Prereq isites for Set p
Modules should be mounted on the mounting plate through the mounting holes provided
on the enclosure. Mod les m st be mo nted vertically! A minim m of 150mm clearance is
imperative above and below to dissipate heat efficiently! Do not drill additional mo nting holes
on the device! Modules should be grounded through the mounting holes. 50kVAr and 80kVAr
modules may also be grounded through connecting the ground cable to the auxiliary power
supply connector.
Electrical connections should follow the wiring diagrams provided in Figures 3.3-3.6 in the
Wiring Diagrams section. “S perfast” electronic branch f ses m st be sed to protect the
thyristor mod les!
12kVAr and 25kVAr modules do not require an auxiliary voltage connection. These modules
are powered internally. The 50kVAr and 80kVAr modules are equipped with a fan and are
designed for forced cooling. Therefore, 50kVAr and 80kVAr mod les req ire an a xiliary voltage
(220V 50Hz) s pply to power internal circ its and the cooling fan!
Modules can be instantaneously activated through a power factor correction relay, or any
other compatible system, by applying a 10-2 VDC trigger signal. Internal circuits are galvanically
isolated from the trigger signal.
Thyristor modules are equipped with an external thermostat terminal. If a detuned filter
reactor is used in the system, the user may attach its thermostat to the external thermostat
terminal on the module. This allows the module to protect the detuned filter reactor from
overheating. If this external thermostat connection is not sed, ser m st short the thermostat
connection terminals for the system to f nction properly!
TECHNICAL USER´S MANUAL
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Thyristor modules
3.2 Installation
CAPACITOR AND DISCHARGE MECHANISM: The recommended capacitor voltages for a 00V
PFC system with and without a detuned filter reactor are listed in Table 3.1. A suitable detuned
filter reactor is recommended to avoid the risk of resonance and reactor acoustic noise.
Table 3.1: Capacitor voltages for PFC with and without a detuned filter reactor
PFC type Recommended Capacitor
Voltage Rating (V)
No detuned filter reactor 00
7% 0
1 % 80
Switching action takes place within 10ms upon receiving the 2 VDC trigger signal given that
the capacitors were appropriately discharged. If the capacitors remain charged, switching action
might be delayed. In point welding and similar applications where capacitors are required to be
switched on and off frequently, the capacitors must be equipped with a discharging. High power
resistors or discharge reactors are recommended to increase switching speed and frequency.
Discharge resistors need to be selected carefully to achieve desired discharge rate. Figures
3.1 and 3.2 show the relationship between the discharge resistance and discharge time for
12.5kVAr, 25kVAr, 50kVAr and 80kVAr PFC systems employing two and three discharge resistors,
respectively. The discharge rates are almost identical for systems with a 7% detuned filter reactor
and without a detuned filter reactor. If a detuned filter reactor is not used, the discharge may be
obtained from 7% curves on Figures 3.1 and 3.2.
The recommended power ratings for common discharge resistor values are listed in Table
3.2. These power ratings allow for safety margins. Avoid use of power resistors lower than the
given ratings. Avoid thermal coupling between the modules and power resistors by keeping a
clearance distance of 150 mm in all directions. Do not place discharge resistors directly
nderneath the mod les!
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Thyristor modules
Fig re 3.1: The effect of discharge resistance on discharge time for 7% (189Hz) and 1 %
(13 Hz) detuned reactor PFC with three discharge resistors. 7% rates may be used if no reactor
is employed.
TECHNICAL USER´S MANUAL
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Thyristor modules
Fig re 3.2: The effect of discharge resistance on discharge time for 7% (189Hz) and 1 %
(13 Hz) detuned reactor PFC with two discharge resistors. 7% rates may be used if no reactor
is employed.
Table 3.2: Recommended power ratings for discharge resistors
Resistance (kΩ) Resistor Power (W)
5.6 100
10 50
18 25
22 25
39 10
56 10
69 5
SUPERFAST FUSE SELECTION: Each thyristor module should be connected to the line through a
“superfast” branch fuse. Depending on the module type, recommended fuse current and voltage
ratings are listed in Table 3.3.
Table 3.3: “Superfast” fuse ratings for each thyristor module
Model C rrent (A) Voltage (V) Power (kVAr)
12kVAr 35 NH AC 690 12.5
25kVAr 63 NH AC 690 25
50kVAr 125 NH AC 690 50
80kVAr 200 NH AC 690 80
MITIGATING HIGH di/dt: When the thyristors are triggered, the current is initiated at the gate-
cathode junction. The current spreads to the entire junction area as it increases. If the current
time rate of change (di/dt) during this process is faster than the charge carriers in the junction,
then the thyristor may get damaged. Absolute maximum di/dt ratings for thyristor modules are
presented in Table 3. . If these values are exceeded, the thyristor modules might be permanently
damaged. Detuned filter reactors limit the di/dt. If a detuned filter reactor is not used, then a
current limiting reactor with a minimum of 20µH inductance is recommended to protect the
module and maintain a long life expectancy.
Table 3.4: Absolute maximum di/dt ratings for module types
Model di/dt (A/µs)
12kVAr 50
25kVAr 100
50kVAr 1 0
80kVAr 1 0
TECHNICAL USER´S MANUAL
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Thyristor modules
3.3 Wiring Diagrams
Wiring diagrams with or without detuned filter reactors for 12kVAr, 25kVAr, 50kVAr and
80kVAr modules are presented in Figures 3.3-3.6.
Fig re 3.3: Recommended wiring diagram for 12kVAr and 25kVAr modules with a detuned
filter reactor and a discharge reactor. Connection terminals, wiring diagrams and structures
of 12kVAr and 25kVAr modules are identical.
TECHNICAL USER´S MANUAL
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Thyristor modules
Fig re 3.4: Recommended wiring diagram for 12kVAr and 25kVAr modules without a detuned
filter reactor and with a discharge reactor. Connection terminals, wiring diagrams and
structures of 12kVAr and 25kVAr modules are identical.
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