| 是否进口：否 | 产地：德国 | 加工定制：是 |
| 品牌：GESTRA AG | 型号：NRS1-50BAC | 测量范围：标准℃ |
GESTRA AG控制系统水位开关NRS1-50BAC
德国Gestra液位电极NRG 16-50
全球工业建立在GESTRA奠定的基础之上，通过智能蒸汽解决方案提高其制造效率。GESTRA致力于生产质量的阀门和控制系统，使德国工程技术保持***地位。通过合作和持续改进的承诺，蒸汽的未来站在几代德国***精密技术的肩上。
锅炉制造商
锅炉制造商
GESTRA的创新数字和自动化解决方案有助于现代锅炉制造商达到安全性和可靠性的标准。
发电
提供高性能解决方案，节省工厂能源并保持运行。
海洋与造船
通过GESTRA的智能设计，限度地发挥应用程序的空间、功能和可靠性。
GESTRA的创新数字和自动化解决方案有助于现代锅炉制造商达到安全性和可靠性的标准。
冷凝疏水阀 BK SERIES
自动 恒温 双金属
冷凝疏水阀
冷凝疏水阀 MK SERIES
自动 恒温
冷凝疏水阀
冷凝疏水阀 UNA SERIES
自动 变面积 高压
冷凝疏水阀
冷凝疏水阀 DK SERIES
手动 热动力 紧凑型
冷凝疏水阀
冷凝疏水阀
自动 双金属 紧凑型
手动阀门
手动阀门 TS 36
用于蒸汽 紧凑型 通用
螺纹接头
螺纹接头 UC 36, UCY 36
直角 紧凑型 回转
流量控制阀
流量控制阀 VK, NRG, VKE
排放 用于蒸汽
试验设备
试验设备 VKP 10, VKP 40 PLUS, VKP 40 PLUS EX
冷凝疏水阀
冷凝疏水阀 AK 45
空气 自动
冷凝疏水阀
冷凝疏水阀 TK 23, TK 24
自动 恒温
冷凝疏水阀
冷凝疏水阀 GK 11, GK 21
自动 手动 机械
A2: CHECK VALVES
卫生止逆阀
卫生止逆阀 SBO SERIES
用于气动装置 黄铜 弹簧
螺纹止逆阀
螺纹止逆阀 MB SERIES
卫生 黄铜 弹簧
盘式止逆阀
盘式止逆阀 RK 70, RK 71
卫生 黄铜 弹簧
盘式止逆阀
盘式止逆阀 RK 41, RK 44, RK 44S
卫生 黄铜 弹簧
盘式止逆阀
盘式止逆阀 RK SERIES
工业用途 用于气动装置 弹簧
盘式止逆阀
盘式止逆阀 RK 86 SERIES
工业用途 弹簧
摆动式止逆阀
摆动式止逆阀 BB SERIES
用于气体 用于蒸汽
摆动式止逆阀
摆动式止逆阀 CB SERIES
摆动式止逆阀
摆动式止逆阀 WB SERIES
Description
The level switch NRS 1-50 is used in conjunction with
level electrode NRG 1...-.. to limit the water level in steam
boilers and (pressurised) hot-water plants.
Water level limiters switch off the heating when the water
level falls below the set minimum level (low water).
Depending on the directives listed below the level switch
NRS 1-50 can be used in combination with the following
level electrodes:
Directive Level electrode type
PED Pressure Equipment Directive 97/23/
EC + Functional
Safety IEC 61508
SIL 3
NRG 16-50
NRG 17-50
NRG 19-50
NRG 111-50
NRG 16-36
VdT?V Bulletin
“Wasserstand 100”
(= Water Level 100)
NRG 16-50
NRG 17-50
NRG 19-50
NRG 111-50
NRG 16-36
NRG 16-11
NRG 17-11
NRG 19-11
NRG 111-11
NRG 16-36
Marine applications
GL/LR Directives
NRG 16-50S
NRG 16-11S
NRG 16-38S
NRG 16-39S
Water Level Limiter
Level Switch
NRS 1-50
Directives and Standards – continued –
Approvals for Marine Applications
The level switch NRS 1-50 in conjunction with level electrodes NRG 16-50S/NRG 16-11S/NRG 16-38S and NRG
16-39S is approved for marine applications.
LVD (Low Voltage Directive) and EMC (Electromagnetic
Compatibility)
The level switch NRS 1-50 meets the requirements of the
Low Voltage Directive 2006/95/EC and the EMC Directive
2004/108/EC.
ATEX (Atmosphère Explosible)
According to the European Directive 94/9/EC the level
switch NRS 1-50 must not be used in potentially ex?plosive
areas.
Technical Data
Mains voltage
24 VDC +/– 20 %, 0.3 A or 100 – 240 VAC +10 / –15%,
47 – 63 Hz, 0.2 A
External fuse
M 0.5 A (semi-delay)
Power consumption
7 VA
Sensitivity of response (Electrical conductivity of water
at 25 °C)
> 0.5 ... <1000 μS/cm or
> ,10 ... <10000 μS/cm
Inputs:
Electrical connection of level electrode
1 input for level electrode NRG 1...-50, NRG 1...-11, NRG
16-36, screened control cable with four poles, minimum
conductor size 0.5 mm2, e. g. LiYCY 4 x 0.5 mm2.
Max. length 100 m with a conductivity > 10 ?S/cm at 25°C.
Max. length 30 m with a conductivity <10 ?S/cm at 25°C.
Stand-by input
1 volt-free input, 24 V DC, for monitoring the purging
and bypass time. Max. bypass time: 5 minutes.
Wiring: control cable 2 x 0.5 mm2.
Outputs:
Safety circuit
2 volt-free make contacts, 24 V DC - 250 V AC, max. 6 A
(resistive/inductive), contact material AgNi.
Delay of response: 3 seconds, 15 sec. for marine
applications.
Provide inductive loads with RC combinations according
to manufacturer&＃39;s specification to ensure interference
suppression.
Signal output
2 volt-free outputs for instantaneous external signalling,
24 – 230 V AC/DC, max. 100 mA.
Wiring: control cable 2 x 0.5 mm2.
Indicators and adjustors
2 buttons for test and diagnosis, 4 red/green LEDs for
indicating the operating mode and alarm.
6 red LEDs for fault diagnosis.
Housing
Housing material: base: polycarbonate, black; front: polycarbonate, grey. Terminal strips separately detachable
Fixing of housing: Mounting clip on supporting rail
TH 35, EN 60715.
Electrical safety
Degree of contamination: 2, overvoltage category III to
EN 61010-01.
Dimensions
Wiring diagram
100
74
120
16 27
1 2 3 4 5 6 7 8
17 18 19 20 21 22 23 24
9
25
10
26
11 12
28
13
29
14
30
15
NRG 1...-50
NRG 16-36
L
M 0,***
(+)
+
(-)
-
N
N L N L
1
1 2
2
4
3
3
+ –
Key
8 Mains supply
9 Signal output 1 / 2 for external alarm
24-230 V AC/DC 100 mA
0 Safety circuit, external input and output
Fuse 2A or 1A, slow-blow (TRD 604, 72 hours)
a Wire link, on site, when used as water level
limiter acc. to TRD, EN 12952 / EN 12953
b Stand-by input 1, 24 V DC,
for connecting the logic unit SRL 6-50
c Level electrode NRG 1...-50, NRG 1...-11,
NRG 16-36
Protection
Housing: IP 40 to EN 60529
Terminal strip: IP 20 to EN 60529
Weight
approx. 0.5 kg
Further conditions:
Ambient temperature
when system is switched on: 0° ... 55°C,
during operation: –10 ... 55°C
Transport temperature
–20 ... +80°C (<100 hours),
defrosting time of the de-energized equipment before it
can be put into operation: 24 hours.
Storage temperature
–20 ... +70°C,
defrosting time of the de-energized equipment before it
can be put into operation: 24 hours.
Relative humidity
max. 95%, no moisture condensation
Site altitude
max. 2000 m
Interlock
In the event of an alarm the level switch NRS 1-50 does
not interlock automatically. If an interlocking function in
the installation is required, the follow-up circuit (safety
circuit) must be equipped with an interlock. The circuitry
must meet the requirements of the EN 50156.
Power Supply, Stand-by Input and
Signal Output
Use a safety power supply unit (SELV) to feed the level
switch NRS 1-50 with 24 V DC.
Only devices with protection by electrical separation or with
low voltage may be connected to the stand-by inputs.
Order & Enquiry Specification
GESTRA Level switch NRS 1-50 as water level limiter acc.
to TRD, EN 12952/EN 12953
Mains supply ...................
Sensitivity ................ μS/cm水位限制器
