Level Monitoring Relay
Level switch HRH-1
serves for level monitoring in wells, tanks, pools, reservoirs....
options:
- single switch with single-state monitoring
- single switch with double-state monitoring
- 2 independent switches with single-state switching
one-state monitors one liquid level ( full or empty), two-state monitors two levels ( switches at one level
and switches off at another)
selectable by DIP switch:
- drain in
- drain away
- combination
adjustable time delay when activated by level change, type selectable by DIP switch
sensitivity adjustable by potentiometer
frequency 50 Hz prevents liquid polarization and increased oxidation of measuring probes
supply AC 230 V or AC/DC 24 V galvanically separated
output contact: 2x changeover 16 A /250 V AC1
Technical parameters
Function:
Supply terminals:
Supply voltage:
Consumption:
Supply voltage tolerance:
HRH-1
4
A1 - A2
AC/DC 230 V, AC/DC 24 V, AC 110 V, (galvanicaly separated)
max. 4.5 VA
-15 %; +10 %
Measuring circuit
Hysteresis (input - opening):
Voltage on electrode:
Current in probes:
Time reaction:
Max. cable capacity:
Length of supply wire to probes:
Time delay tD:
Time delay tH:
in an adjustable range 5 kΩ- 100 kΩ
max. AC 5 V
AC <1 mA
max. 400 ms
4 nF
max. 100 m
adjustable 0.5 -10 sec
adjustable 0.5 -10 sec
Symbol
Connection
A1
16 18
28 26
A2
15
25
Un
C
D
H
S
A1 A2 C
Terminals description:
A1, A2 - supply voltage
C - wire for both probes
D - wire of bottom probe E2
H - wire of upper probe E1
S - earth terminal for possible screening of cable
15-16-18 output contact relay 1
25-26-28 output contact relay 2
D H S
16 15 18 28 25 26
MONITORING RELAYS
Accuracy
Setting accuracy (mech.):
Output
Number of contacts:
Rated current:
Breaking capacity:
Inrush current:
Switching voltage:
Min. breaking capacity DC:
Mechanical life:
Electrical life (AC1):
Other information
Operating temperature:
Storage temperature:
Electrical strength:
Operating position:
Mounting:
Protection degree:
Overvoltage cathegory:
Pollution degree:
Max. cable size:
Dimensions:
Weight:
Standards:
Measuring sensors:
±5%
2x changeover (AgNi )
16 A / AC1
4000 VA / AC1, 384 W / DC
30 A / < 3 s
250 V AC1 / 24 V DC
500 mW
3x107
0.7x105
0
-20 .. +55 C
-30 .. +70 0C
4 kV (supply - output)
any
DIN rail EN 60715
IP 40 from front panel
III.
2
solid wire max.1x 2.5 or 2x1.5/ with cavern max. 1x1.5
90 x 52 x 65 mm, see page 90-92
240 g
EN 60255-6, EN 61010-1
see page 67
Measuring probes
Selection of delay type of input H
Selection of delay type of input D
Inversion of function of input D
Function selection: double/single level relay
Indication of
supply voltage
Output contact
1. relay
Adjusting
delay input H
Output contact
2. relay
Adjusting
delay input D
Adjusting sensitivity of probe
according to liquid resistance
Funktion description
It is a relay to control levels of conductive liquids (water, chemical solutions, foodstuff. etc.) It means
measuring of liquids by measuring probes. AC voltage 5V / 50 Hz is used as a measuring signal. Using
this AC signal prevents increased oxidation of probes and undesirable polarization and electrolysis of
liquid. It is possible to control two independent levels or to use a combined function for one level
control. It depends on DIP switch setting (see also diagram of functions). Relay is equipped by sensitivity regulation that applies to liquid resistance. When the sensitivity is set according to particular
conditions it is possible to eliminate some undesirable switching (e.g. pollution of probes, sediments,
humidity etc.) It is also possible to set a delay for each probe in range 0.5 - 10 s and by ussing. DIP
switch also the type of delay (when the relay is switched on/off, the choice dependson particular
application.
Measuring probe can be arbitrary (whatever conductive contact, recommended is using of brass or stainless-steel material). Conductor doesn´t need to be screened, but it is recommened
according EMC reports. In application of screened conductor is this contacted to terminal S (the
earth potential).
68
Examples of use
monitoring 2 independent containers
monitoring level with combination of upper and bottom probe
A1 A2 C
tank with
monitored level
tank with
monitored level
16 15 18 28 25 26
controlling of pump or other output appliance
controlling of pump or other output appliance
D
H S
16 15 18 28 25 26
probe H
H S
probe D
D
probe H
A1 A2 C
common
probe C
Un
common
probe C
probe D
common
probe C
Un
tank with
monitored level
Output relay for pump controlling.
Selection of contacts depends on required function.
Note:
a tank or metal tube, etc. can be used as a common probe. Due probes that are galvanically separated from suplly voltage and monitoring voltage up to 5V, is possible to
use standard communication cables for connection
Function
C
D
H
C
D
H
C
D
H
C
D
H
a
a
a
a
Level monitoring in two tanks
A1-A2
tB
tA
Re2
(25-28)
tB
tA
DIP 3 = tA
DIP 3 = tB
DIP 4 = tA
DIP 4 = tB
Input D is inverted when DIP 2 is in position OFF, relay is closed
when the container is full. DIP2 = OFF
Function H is the same as in previous adjustment.
Level monitoring in one tank
tB
tA
Out1
(15-18)
DIP 3 = tA
DIP 3 = tB
tB
tA
Out1
(15-18)
DIP 3 = tA
DIP 3 = tB
Out2
(25-28)
tB
tB
tA
DIP 4 = tA
DIP 4 = tB
Out1
(15-18)
tB
tA
DIP 3 = tA
DIP 3 = tB
Out2
(25-26)
tB
tA
DIP 4 = tA
DIP 4 = tB
69
Both probes in one container.
DIP 1 = 2x
DIP 2 = ON
Relay 1 - closed when container is full
- opened when bottom probe is disconnected
Relay 2 - closed when bottom probe is disconnected
- opened when upper probe is closed
Monitoring liquid in container.
DIP 1 = 1x
DIP 2 = ON
Relay 1 closed when bottom probe is disconnected (liquid is being
pumped in).
Relay 2 closed (break contact used), when upper probe is connected
(liquid is being pumped out).
MONITORING RELAYS
Out1
(15-18)
2 independent single level switches.
Relay closed when container is empty.
DIP 1 = 1x
DIP 2 = ON
Level switch HRH-2
!
!
MONITORING RELAYS
Technical parameters
Function:
Supply terminals:
Supply voltage:
Consumption:
Supply voltage tolerance:
Measuring circuit
Hysteresis (input resistence):
Voltage on electrode:
Current in probes:
Time reaction:
Max. probe capacity:
Time delay
Accuracy
Setting accuracy (mech):
Output
Number of contacts:
Rated current:
Breaking capacity:
Inrush current:
Switching voltage:
Min. breaking capacity DC:
Mechanical life:
Electrical life (AC1):
Other information
Operating temperature:
Storage temperature:
Electrical strength:
Operating position:
Mounting:
Protection degree:
Overvoltage cathegory:
Pollution degree:
Max. cable size (mm2):
Dimensions:
Weight:
Standards:
Measuring sensors:
HRH-2
2
A1 - A2
AC/DC 230 V, AC/DC 24 V or AC 110 V
max. 2.5 VA
-15 %; +10 %
to control levels in wells, basins, reservoirs, pools, tankers...
options:
- single switch with single-state monitoring
- single switch with double-state monitoring
!
one-stated monitors one level, two-stated monitors two levels ( switches on one level and breaks
on another)
!
selection function of: pump up (filling) or pump down (emptying)
!
adjustable time delay of output (1 - 10 s)
!
adjustable hysteresis (5 - 100 kΩ)
!
frequency 50 Hz avoid liquid polarization and oxidation of measuring probes
!
supply AC/DC 230 V, AC/DC 24 V or AC/DC 110 V galvanically separated
!
Output contakt 1x changeover 16 A / 250 V AC1
!
1-MODULE, DIN rail mounting
Connection
Un
Two levels monitoring
A1
A2
A1
A2
H
D
H
D
C
S
C
S
max
max
in an adjustable range 5 kΩ- 100 kΩ
max. AC 5 V
AC <0.5 mA
max. 400 ms
3 nF
adjustable 0-10 sec
min
tank with monitored
level
16 A / AC1
4000 VA / AC1, 384 W / DC
30 A / < 3 s
250 V AC1 / 24 V DC
500 mW
3x107
0.7x105
-20.. +55 0C
-30.. +70 0C
3.75 kV (supply - sensor)
any
DIN rail EN 60715
IP 40 from front panel
III.
2
solid wire max.1x 2.5 or 2x1.5/ with cavern 1x2.5
90 x 17.6 x 64 mm, see page 90-92
76 g
EN 60255-6, EN 61010-1
see page 72
tank with monitored
level
15 16 18
15 16 18
Function
PUMP UP (FILLING)
±5%
1x changeover (AgNi )
Un
One level monitoring
PUMP DOWN (EMPTYING)
level
level
Description
A1
Supply terminals
Level probe terminals
A2
H
D
Output indication
Supply indication
Adjustable sensitivity sounders
Selection of function
Time delay for output
Symbol
A1
C
D
H
S
S
C
16 18
Level probe terminals
15
16
18
Output contact
A2
15
Function description
The HRH-2 is conductive liquid level control relay. The HRH-2 can be used with two probes if the chassis of the holding tank is metal, on non conductive tanks is required a third probe. There are
used three probes for measuring: H- high level, D - down level, C - common probe. C-probe is also connectable with protective conductor of supply system (PE). The HRH-2 is selectable for pump
up or pump down (filling or emptying). It is possible to set device sensitivity according to liquid conduction (appropriate to liquid resistance in range 5Kohms to 100Kohms. When requested
controlling of only one level inputs H+D, must be connected and link to sole sensor. When the HRH-2 is set for pump up (filling) on connection of the auxiliary supply and the level is between
the min and max probes the output relay will be de-energised. When the level falls below the min probe the relay output will energise after the set time delay. When the HRH-2 is set for pump
down (emptying) on connection of the auxiliary supply and the level is between the min and max probes the output relay will be de-energised. For unwanted switching of output contacts due
to level swirling is possible to adjust output delay of 1 - 10 sec. There is recommended screened cabel on probes when requested higher immunity against industry interference.
70
Level set HRH-4
Technical parameters
HRH-4
Function:
Supply voltage:
Consumption:
Supply voltage tolerance:
Measuring circuit
Hysteresis (input resistence):
Voltage on electrode:
Current in probes:
Max.length of sensor wires:
Time reaction:
Max. probe capacity:
Time delay:
Accuracy
Setting accuracy (mech):
Output
Number of contacts:
Rated thermal current:
Loading in AC3:
Mechanical life:
Other information
2
AC/DC 230 V or AC/DC 24 V
7 VA
-15 %; +10 %
!
in an easy way automatizes operation of pumps depending on level
!
control of level in wells, tanks, pools, reservoirs...
!
delivered as a connected set – easy installation
!
possibility to monitor level of any type of conductive liquid
!
designated for an automatic operation in 1-phased and 3-phased pumps
!
set of level switch HRH-2 and a contactor VS-425
!
function choice – pumping up or down
!
unit doesn’t have its own protection- it is necessary to ad a suitable protection element
!
protection degree of the set is IP55
!
there is a possibility of 4 types of probes in a various design (they are not a part of this set)
!
unit is placed in a plastic box with dimensions 160x135x83
Connection
protection element
in an adjustable range 5 kΩ- 100 kΩ
AC 5 V / 50 Hz
AC <0.5 mA
max. 100 m of unscreened wire
max. 400 ms
3 nF
adjustable 0-10 sec
-
+
±5%
4x switching
25 A
5.5 kW / 400 V
3x106
A1
A2
H
D
C
S
VS425-40
control lamp
Operation temperature:
Storage temperature:
Electrical strength (supply-output):
Operating position:
Protection degree:
Pollution degree:
Dimensions:
Weight:
Standards:
Measuring sensors:
-20.. +55 0C
-30.. +70 0C
4 kV, galvanically insulated
any
IP 55
screening is not
necessary
M
2
160x135x83
834 g
EN 60255-6, EN 61010-1
see page 72
Funktion description
1. function PUMP UP
level
output of a contactor
2. function PUMP DOWN
level
output of a contactor
71
1) PUMP UP - in case the level falls under a lower limit ( sensor D), a relay switches and
a pump pumps a liquid up until it reaches an upper limit ( probe H), then a relay opens and a pump
stops pumping. When a level reaches a lower limit again, all process is repeated.
After the device is energized, relay automatically closes and a pump pumps liquid to upper limit.
2) PUMP DOWN - in case a level reaches over an upper limit, a relay closes and a pump
pumps liquid down. In case a level reaches a lower limit, a relay opens and a pump stops pumping..
When energized, a relay is in an open state and a pump operates only after an upper limit is
exceeded.
3) In case you combine inputs H and D and connect them to one probe, the device will keep only one
level (upper and lower limit will become one).
In function PUMP UP relay closes in case the level falls under a probe level. A pump pumps liquid
up and in case the level reaches a probe level, a relay opens and a pump stops.
The level is kept in a small range around the probe.
In function PUMP DOWN relays closes in case a level reaches a probe level. A pump pumps down
until the level reaches a probe, then relay opens and pump stops.
MONITORING RELAYS
15 16 18
Level sensors SHR - Level switches accessories
SHR-1-M: brass sensor
SHR-1-M
SHR-1-N
SHR-1-N: stainless steel sensor
!
sensor to control flooding
!
electrode with diametr 4 mm is placed in plastic cover with 12 mm screw with nut
!
panel or to holder mounting
!
conductor is connected to terminal board, shrink bushing for feeder place insulation is a part of device
!
max. wire profile: 2.5 mm2
!
installation: after connecting a wire to the sensor, run the shrink bushing over the wire onto the sensor. Heat the
sensor and by shrinking the connection of sensor and wire will be hermetical
!
weight: 9.7 g
!
operating temperature: - 25...+60 0 C
!
total sensor lenght: 65.5 mm
SHR-2
!
!
!
detection sensor is electrode, which in connection with switchable device is used for level detection
for example in wells,tanks,...
to be ued in electric conductive fluids and mechanically polluted fluids with temperature: +1...+80 0 C
stainless steel one-pole electrode reside in PVC cover, intended for tank wall mounting or mounting by socket
!
to ensure corret function of the sensor, it is necessary to have the electrode without dirt which could disable the
connection of the electrode and fluid and thus lead to malfunction
!
max. wire profile: 2.5 mm 2 , recomended wire ÖLFLON FEP 1x1.0 BK
!
installation:
- conductor wire is connected by feazing of two brass screws to stainless steel electrode
- conductor is caulked by bushing Pg7 with protection degree IP68
!
weight: 48.6 g
!
dimensions: max. diameter 21 mm, lenght 96 mm
!
!
!
!
!
!
!
!
!
!
!
SHR-3
stainless probe to be used into demanding industrial environments, designated for screwing into tank wall or cover
the probe is installed in horisontal, vertical or in sidelong position on tank side or in tank cover. Installation is done by
soldering or by fixing nut. It is necessary to use 24mm screw. It is necessary to use an adequate torque with regards
to a seal and operational overpressure in a tank
sensor has connecting wire - lenght 3 m, which is connected to sensor to scan electrode and sensor bushing
connecting wire is double-wire PVC 2 x 0.75 mm 2 , connection of wires: brown - scan electrode, blue - sensor bushing
connection M18x1.5 screw
protection degree IP 67,
sensor weight without cable: 100 g
operating surroundings: place without the danger of detonation , temperature on screw: max. 95 O C,
pressure immunity: on 25 O C 4 MPa, on 95 O C 1.5 MPa
weight: 239 g
material: bushing and sean electrode: stainless steel W.Nr. 1.4301, insulation insert of electrode: PTFE,
internal material: self - extinguishing epoxide resin
6 hr OK24
23.5
12
14
Dimensions
M18x1.5
MONITORING RELAYS
SHR-2 in open state
12
13
37
72
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