ELKO ep HRF-10 Frequency Monitoring Relay Instruction Manual
- June 12, 2024
- ELKO ep
Table of Contents
HRF-10
Frequency monitoring relay
Characteristics
- The relay serves to monitor frequency of AC voltage, e.g. in photovoltaic power stations, generators.
- The monitored frequency 50 / 60 / 400 Hz is selected by a switch
- Two adjustable levels of frequency (Fmin, Fmax) in the range of 80 – 120 % Fn
- Adjustable diff erence level.
- Adjustable delay level.
Connection
Description
- Supply voltage indication
- Indication F > Fmax
- Indication F < Fmin
- Output contact
- Supply / monitored voltage terminals
- Delay setting
- Diff erence setting
- Fmax setting
- Fn setting
- Fmin setting
Technical parameters
HRF-10
| Supply and monitoring terminals: | L, N |
|---|---|
| Supply voltage: | AC 161 – 500 V |
| Rated frequency Fn: | 50 / 60 / 400 Hz |
| Burden (max): | 1.7 VA / 1.1 W |
| Max. dissipated power (Un + terminals): | **** 2 W |
Overload capacity
– continuous:
– max. 10 s:| ****
500 V
550 V
Frequency Fmax:| adjustable 80 – 120 % Fn
Frequency Fmin:| adjustable 80 – 120 % Fn
Difference:| adjustable 0.5 – 5 % Fn
Delay (until failure):| ****
adjustable 0.5 – 10 s
Opening level (Uopen):| 161 V
Output relay – contact:| 2x changeover / SPDT (AgNi) gilded
AC contact capacity:| 250 V / 8 A, max. 2000 VA
DC contact capacity:| 30 V / 8 A
Mechanical life:| 30 000 000
Other information|
Operating temperature:| -20 °C to 55 °C (-4 °F to 131 °F)
Storage temperature:| -30 °C to 70 °C (-22 °F to 158 °F)
Electrical strenght (supply – relay contact):| **** 4 kV / 1 min.
Overvoltage category:| III.
Pollution degree:| 2
Protection degree:| IP40 front panel / IP20 terminals
Max. cable size (mm2):| max. 2x 1.5 / 1x 2.5 (AWG 12)
Dimensions:| 90 x 52 x 64 mm (3.5 x 2 x 2.6˝)
Weight:| 127 g (4.5 oz.)
Standards:| EN 61000-6-2, EN 61000-6-4, EN 60255-1, EN 60255-26, EN 60255-27
Function
After the supply (monitored) voltage is connected, the green LED is on.
If the value of the monitored frequency falls within the range between the two
set levels Fmin – Fmax no red LED is on. The relay UNDER is triggered
(contacts 15-16-18) and the relay OVER is disconnected (contacts 25-26-28).
If the monitored frequency exceeds the set level Fmax, the relay OVER is
triggered after the set delay timing elapses and the red LED OVER goes on. The
red LED fl ashes during the timing.
If the monitored frequency drops below Fmax – diff erence, the relay is
activated without delay and the red LED OVER goes off .
If the monitored frequency drops below the set level Fmin, the relay UNDER is
disconnected after the set delay timing elapses and the red LED UNDER goes on.
The red LED fl ashes during the timing. If the monitored frequency exceeds the
level Fmin + the diff erence, the relay is triggered without delay and the red
LED UNDER goes off .
If the monitored voltage is lower than the opening level Uopen both the relays
are disconnected and both the red LED (UNDER and OVER) start fl ashing slowly
– indicating insuffi cient supply voltage.
Warning
Device is constructed for connection in 1-phase main alternating current voltage and must be installed according to norms valid in the state of application. Connection according to the details in this direction. Installation, connection, setting and servicing should be installed by qualifi ed electrician staff only, who has learnt these instruction and functions of the device. This device contains protection against overvoltage peaks and disturbancies in supply. For correct function of the protection of this device there must be suitable protections of higher degree (A, B, C) installed in front of them. According to standards elimination of disturbancies must be ensured. Before installation the main switch must be in position “OFF” and the device should be de-energized. Don´t install the device to sources of excessive electro-magnetic interference. By correct installation ensure ideal air circulation so in case of permanent operation and higher ambient temperature the maximal operating temperature of the device is not exceeded. For installation and setting use screw-driver cca 2 mm. The device is fully- electronic – installation should be carried out according to this fact. Non- problematic function depends also on the way of transportation, storing and handling. In case of any signs of destruction, deformation, nonfunction or missing part, don´t install and claim at your seller.
ELKO EP, s.r.o.
Palackého 493
769 01 Holešov, Všetuly
Czech Republic
Tel.: +420 573 514 211
e-mail: elko@elkoep.com
www.elkoep.com
Made in Czech Republic
02-15/2017 Rev.: 2