Danfoss BCP, BCP1H, BCP2H, BCP3H, BCP4H Data sheet

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Data sheet
Pressure switch
Type BCP
The BCP type is a series of dedicated pressure switches for safety and pressure monitoring of steam and hot water boilers.
The BCP incorporates a single-pole changeover microswitch where the contact position depends on the pressure in the connection port and the range set value.
For installations, in which operation is particularly critical for safety reason, the use of fail-safe control is recommended.
Features
y Available as high and low pressure limiters as well as
pressure controllers
y Wide pressure range:
from low pressure BCP1 with narrow dierential to high pressure BCP7
y The fail-safe dual bellows enable premature cut-out when
fault occurs
y DIN plug mounted on the top of control for easy electrical
wiring
y Single-pole changeover switch (SPDT), switch + alarm
CE-marked in accordance with EN 60947-4/-5 VdTŰV-Merkblatt „Druck 100” TŰV. SDWFS/SDBFS . 15 - 335
y Direct mounting on pressure connection or wall mounting
by means of a bracket
y Versions with automatic and manual resets available
y Screw adjustments made on top of housing
y Manual reset for pressure limiters possible only by means
of tools
y Safety Integrity Level: SIL 2 according to IEC 61508:2010
CE marked in accordance with 2014/68/EU, category IV, safety equipment, testing basis pr EN12952-11 and EN12953-9.
IC.PD.P10.1M.02 | 520B7825 | 1© Danfoss | DCS (jmn) | 2017.02
Data sheet | Pressure switch, type BCP
Materials in contact with media
Technical data
Bellows: stainless steel X2CrNi19-11,
1.4306 acc. to EN 10088-2
Pressure connection: nickel plated free cutting steel or stainless steel X5CrNi18-10,
1.4301 acc. to EN 10088-2
Media Steam, water, air
Ambient temperature -20 – 70 °C
Media temperature
Enclosure
Up to 120 °C (Above 120 ˚C a water-filled loop must be installed).
IP65
Type BCP - 2B
Action t ype acc. to EN 60730
Types BCPL/BCPH - 2BDF
Electrical connection Plug DIN 43650, Pg 11
Switch type SPDT, snap action microswitch
Contact material Silver/gold (gold plated silver)
Minimum 1mA, 5V
2
Contact load
Maximum1)
) AC-1: 6A, 250V
3
) AC-15: 1A , 250 V
4)
DC 13 10W, 250 V
Ordering
Expected electrical lifetime Min. 250 000 cycles under full contact load.
1
) If used with current higher than 100mA and voltage higher than 30V
the gold layer will be burnt away and the unit can’t be used at a lower current again.
2
) AC-1 Ohmic load, cosφ 1.
3
) AC-15 inductive load like coil and contactors
with, cosφ 0.3.
4) DC-13 Direct current load.
High pressure limiters
Type Range
[bar]
Fixed
Dierential
avg.
[bar]
Reset
Max. operating
pressure
[bar]
Max.
test
pressure
[bar]
Pressure
connection
Code no.
BCP1H 0.1 – 1.1 0.10 Man. 6 7 G 1⁄2 A 017B0030 BCP2H 0.0 – 2.5 0.20
Man.
10 11
G 1⁄2 A
017B0034
BCP3H 0.0 – 6.0 0.40 Man. 16 18 G 1⁄2 A 017B0038 BCP3H 0.0 – 6.0 0.40 Man. 16 18 G 1⁄2 A 017B01381) BCP4H 1.0 – 10.0 0.45 Man. 25 28 G 1⁄2 A 017B0042 BCP5H 2.0 – 16.0 1.20 Man. 32 35 G 1⁄2 A 017B0046 BCP6H 5.0 – 25.0 1.50 Man. 40 45 G 1⁄2 A 017B0050 BCP7H 10.0 – 40.0 2.30 Man. 63 70 G 1⁄2 A 017B0054
Low pressure limiters
Type Range
[bar]
Fixed
Dierential
avg.
[bar]
Reset
Max. operating
pressure
[bar]
Max.
test
pressure
[bar]
Pressure
connection
Code no.
BCP2L 0.0 – 2.5 0.20 Man. 10 11 G 1⁄2 A 017B0058 BCP3L 0.0 – 6.0 0.40 Man. 16 18 G 1⁄2 A 017B0062 BCP4L 1.0 – 10.0 0.45 Man. 25 28 G 1⁄2 A 017B0066 BCP5L 2.0 – 16.0 1.20 Man. 32 35 G 1⁄2 A 017B0070 BCP6L 5.0 – 25.0 1.20 Man. 40 45 G 1⁄2 A 017B0074
© Danfoss | DCS (jmn) | 2017.022 | IC.PD.P10.1M.02 | 520B7825
Data sheet | Pressure switch, type BCP
Ordering
Pressure controllers
Dierential
Type Range
[bar] BCP1 0.1 – 1.1 0.15 – 0.6
BCP2 0.0 – 2.5 0.4 – 1.0 Auto 10 11 G 1⁄2 A 017B0006 BCP3 0.0 – 6.0 0.7 – 1.4 Auto 16 18 G 1⁄2 A 017B0010 BCP3 0.0 – 6.0 0.7 – 1.4 Auto 16 18 G 1⁄2 A 017B01101) BCP4 1.0 – 10.0 1.0 – 2.5 Auto 25 28 G 1⁄2 A 017B0014 BCP5 2.0 – 16.0 2.0 – 3.2 Auto 32 35 G 1⁄2 A 017B0018 BCP6 5.0 – 25.0 2.5 – 4.0
BCP7 10.0 – 40.0 3.0 – 6.0 Auto 63 70 G 1⁄2 A 017B0026
1
) Stainless steel pressure connector
avg.
[bar]
Reset
Auto
Auto
Max. operating
pressure
[bar]
6 7
40 45
Max.
test
pressure
[bar]
Pressure
connection
G 1⁄2 A
G 1⁄2 A
Code no.
017B0002
017B0022
© Danfoss | DCS (jmn) | 2017.02 IC.PD.P10.1M.02 | 520B7825 | 3
Danfoss
17-894.11
Data sheet | Pressure switch, type BCP
Design and function
1. Main spindle
2. Main spring
3. Dierential spindle
4. Dierential spring
5. Reset spring
6. Activating arm
7. Bellows
8. Pressure connection
9. Reset push button
10. Dierential knob
11. DIN plug
12. Microswitch
13. Michroswitch bracket
14. Range knob
Pressure switch, type BCP
Reset
Version with automatic reset cut-in again automatically when the pressure falls to the set point minus dierential. Version with manual reset has to be cut in manually by means of tool.
Fail-safe bellows concept
BCP 6, BCP 6H, BCP 7, and BCP 7H have a double bellows: an operating bellows (inner) and safety bellows (outer).
17-893.11
3
2
1. Pressure connection
2. Regulating bellows
3. Safety bellows
1
Danfoss
Microswitch
BCP is a microswitch based control with DIN plug. Such design enables easy electrical connection and makes control suitable for operation with modern electronic systems, as PLC.
Silver/gold plated contacts
Silver/gold plated contacts are used for low currents and middle range of current, especially in applications with PLC or other corresponding electronic devices. Such contacts have also signicantly lower emission of electromagnetic noises produced on contact break. EMC (Electro Magnetic Compatibility) is an important parameter where electronic equipment is used. A gold plated contact has a silver layer under the gold and can therefore also be used in the middle range of load. The gold will disappear at loads above 0,1 A.
Note:
Ambient temperature inuence All BCP pressure switches operate independently of changes in ambient temperature around the switch. Therefore the settings for cut-out pressure and dierential stay constant unless the permissible ambient temperature is exceeded. When system pressure exceeds the set value, the BCP will automatically stop the plant. A rupture in the inner bellows cause the control cut-out pressure to fall about 3 times less then the preset value, thus the system stops prematurely. A rupture in the outer bellows cause the control cut-out pressure to fall about 3 bar under the preset value, thus providing a fail-safe function.
In other BCP types with single bellows assembly, fail-safe function is satised by proved 2 millions cycles mechanical life time test.
© Danfoss | DCS (jmn) | 2017.024 | IC.PD.P10.1M.02 | 520B7825
Data sheet | Pressure switch, type BCP
Setting
Terminology
Note:
Cut-in and cut-out pressures of the system should always be checked with accurate pressure gauges.
Pressure settings for switches (with automatic reset)
Set the cut-out pressure on RANGE scale and dierential on DIFF. scale. Restart pressure is equal to cut-out pressure minus pre-set dierential value.
Pressure switches with manual reset High pressure limiters
Set cut-out pressure on the RANGE scale. Pressure limiter can only be manually reset by pressing reset button by means of tools when the pressure is equal to or below the cut-out pressure minus value of the dierential.
Pressure limiters
Limiters are devices that, on reaching a xed value interrupt and lock out the energy supply. Manual unlocking is required before restart. A limiter shall be such that a single fault in any related part shall not lead to a loss of the safety function.
Note:
If a BCP pressure controller with automatic reset is used as limiter, lockout must be realized externally as a part of safety logic, e.g.: by external contactors and/ or relays according to requirements of standard prEN501156-1 for safety relevant hardware. External closure must be interlocked, while loss of auxiliary energy must lead to closure. Resetting must not be automated; it has to be performed manually. Resetting on fault must lead to a repeated closure. When BCP limits, is for rising or falling applications, the external safety logic must change to fail-safe position.
Fail-safe control
A control is fail-safe if it has the capability to remain in a safe condition or transition to a safe condition when a fault occurs.
Low pressure limiters
Set cut-out pressure on RANGE scale. Limiter can only be reset manually by pressing (with tool) the reset button when pressure rises to cut-out pressure plus dierential or above it.
Note:
Pressure limiters have no dierential scale. Fixed dierential value is printed on the scale plate.
Maximum working pressure
The maximum permissible pressure for safe functioning of the system or any of its components.
Snap function
A specic contact force is maintained in micro-switch until snap is initiated, therefore, contact bounce cannot occur as a result, for example, of slight vibrations before cut-out. These design features ensure that the cut-out point of the BCP control remains very accurate and completely independent of the magnitude of the current load.
Set point
A predetermined value to which a control is adjusted and at which it performs its intended function.
Dierential
The dierence between pressure cut-out and pressure cut-in.
Reset
1. Manual reset A unit with manual reset can only be restored to operational mode by activation of the external reset button.
Note:
If the system pressure exceeds PS/MWP then accuracy of the control settings can be lost.
Maximum test pressure
The maximum pressure applied in strength or leakage tests on heating systems or components thereof.
2. Automatic reset A unit with automatic reset is restored to operational mode automatically
© Danfoss | DCS (jmn) | 2017.02 IC.PD.P10.1M.02 | 520B7825 | 5
Data sheet | Pressure switch, type BCP
Installation in steam systems
Dimensions [mm] and weights [kg]
To protect the pressure element against excessive temperature of the media, above allowable 120 °C the insertion of water­lled loop is recommended.
BCP types except for BCP 1 and BCP 1H
Types BCP 1 and BCP1H
Net weight: 0.5 kg
© Danfoss | DCS (jmn) | 2017.026 | IC.PD.P10.1M.02 | 520B7825
Accessories for BCP
17-900.11
4x
pressure switches
Mounting bracket, code number 017B1018, for direct mountng on the wall
Mounting bracket for T 35 mm rail, code number 017B1019
For 35mm rail
Danfoss
17-901.11
ø5.5
Mounting of BCP on the 35 mm rail
Danfoss
For 35mm rail
© Danfoss | DCS (jmn) | 2017.02 IC.PD.P10.1M.02 | 520B7825 | 7
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