Gestra NRS 1-50 Level Switch

จำหน่ายอุปกรณ์ Gestra Level Switch รุ่น NRS 1-50 สำหรับ For ONE electrode ราคาถูก ของแท้ หรือที่เรียกว่า เซ็นเซอร์วัดระดับของเหลว ที่ใช้ในการตรวจวัดระดับของเหลว (Liquid) ไอน้ำ ส่งฟรี ทั่วประเทศไทย

Flowserve Gestra NRS1-50
Steam Boiler Water Level Equipment 24VDC

Function

The NRS 1-50 level switch is designed for different boiler water conductivities and for the connection of a single level electrode.

If the water falls below the minimum level, the level electrode is exposed and an alarm is triggered in the level switch. This switchpoint is determined by the length of the electrode extension (level electrode NRG 1...-50).

When the off delay has elapsed, the two output contacts of the level switch open the safety circuit for heating. The heating cut-off is interlocked in the external safety circuit and this interlock can only be deactivated again when the level electrode is immersed once more. In addition, the signal contact for external signaling devices closes without a delay. The NRS 1-50 level switch must be used in combination with an external manual reset when used as a protective device per ASME CSD-1.

An alarm is also triggered if faults occur in a level electrode and/or in the electrical connection.

If the level electrode is installed in a level pot outside the boiler, make sure the connection pipes are sufficiently large.

The manufacturer recommends connection pipes of ≥ 1.57 in (40 mm) for steam and ≥ 3.94 in (100 mm) for water. If smaller connection pipes or fittings are used, these shall not be smaller
than 1-inch NPS. The level pot must have a suitable flushing device at its lowest point. This device flushes the connection pipes to the boiler and enables the function of the water level limiter to be tested. No shut-off valves of any type shall be placed in the piping between the boiler and the low water cut-off.

An automatic self-test monitors the safety functions in the level switch and the level electrode.

In the event of a fault, the safety circuit opens without a delay and switches the heating off.

Alarm and fault indications are displayed by LEDs and an alarm can be simulated by pressing a button.

Technical data

Supply voltage
• 24 VDC +/– 20%, 0.3 A; SELV / PELV / CLASS2
• 100–240 VAC +10 / –15%, 47 – 63 Hz, 0.2 A (optional)

Fuse
• External 0.5A; UL category JDYX, e.g., RND 170-00012

Power consumption
• 7 W

Response sensitivity
[Water conductivity at 77 °F (25 °C)]
• > 5 ... < 5000 ppm (> 10 ... < 10000 µS/cm)

Level electrode connection
• 1 input for NRG 1...-50 level electrode, 4-pole with shield.

Safety circuit
• 2 volt-free NO contacts, 6 A 250 V AC / 30 V DC cos ϕ = 1.
• Off delay 3 seconds.
• Inductive loads must have interference suppression (RC combination) as specified by the manufacturer.

Signal output
• 2 volt-free outputs for external signaling without delay, 24 V DC, max. 100 mA (semiconductor output).

Indicators and controls
• 2 buttons for testing and diagnosis,
• 2 red/green LEDs for indicating operating state and alarm.
• 3 red LEDs for diagnosis.

Terminal box
Terminal box material: base of black polycarbonate, front of gray polycarbonate
Wire size: 1 x AWG12 (4.0 mm2) solid, or
1 x AWG14 (2.5 mm2) stranded with sleeve acc. to DIN 46228, or
2 x AWG16 (1.4 mm2) stranded with sleeve acc. to DIN 46228
Terminal strips can be removed separately
Terminal box attachment: Mounting clip on support rail TH 35, EN 60715

Electrical safety
• Pollution degree 2, overvoltage category II according to UL 60730-1

Protection
• Terminal box: IP 40 according to EN 60529
• Terminal strip: IP 20 according to EN 60529
• As a UL open type, the equipment must be installed in a control cabinet.

Weight
• Approx. 1.1 lb (0.5 kg)

Ambient temperature
• at power-on 32 ° ... 131 °F (0 ° … 55 °C)
• in operation 14 ° … 131 °F (-10 ° … 55 °C)

Transport temperature
• -4 ° … 176 °F (-20 ° … +80 °C) (<100 hours), only switch on after a defrosting period of 24 hours.

Storage temperature
• -4 ° … 158 °F (-20 ° … +70 °C), only switch on after a defrosting period of 24 hours.

Relative humidity
• Max. 95%, non-condensing

Site altitude
• Max. 6560 ft (2000 m)

Other information
• Incorporated Type 2 action protective control Class B (C)
• Pollution degree 2, impulse voltage 2500 V

FLOWSERVE LEVEL SWITCH NRS1-50

STEVI
ARI-STEVI 440/441
ARI-STEVI 448/449
ARI-STEVI 450/451
ARI-STEVI 453
ZETRIX
PREDU
PREDEX
PRESO
TEMPTROL
STEVI-H DP32-35
ARI-Premio Plus2G
ARI-Premio
PACO
Reducing valve
Control valve
Steam trap
Blowdown valve
STEVI
ZETRIX
PREDU
PREDEX
PRESO
TEMPTROL
STEVI-H DP32-35
ARI-Premio Plus2G
ARI-Premio
PACO
Gestra BK45, BK46
Gestra BK15
Gestra BK27N
Gestra BK37, BK28, BK29
Gestra BK212thailand
Gestra MK35/31, MK35/32
Gestra MK35/2S, MK35/2S3
Gestra MK25/2, MK25/2S
Gestra MK45-1, MK45-2, MK45 A-1, MK45 A-2
Gestra MK36/51, MK36/52 ขนาด 1/4
Gestra NRGS15-1
Gestra NRGS11-1, NRGS16-1
Gestra NRGS11-2, NRGS16-2
Gestra NRGT 26-1
Gestra LRGS15-1
Gestra NRG16-40, NRG17-40, NRG19-40
NRS1-40 , NRS1-40.1
Gestra NRG111-40
Gestra NRG16-41, NRG17-41, NRG19-41
NRS1-41
Gestra NRG16-41.1, NRG17-41.1, NRG19-41.1
NRS1-40.1
Gestra NRG26-40
NRS 2-40 / NRR 2-40
Gestra NRG16-42
NRS 1-42
Gestra URB1
Gestra URB2
Gestra LRG16-40, LRG16-41, LRG17-40
Gestra NRG16-4, 1
Gestra NRG26-21
Gestra LRG16-4
Gestra LRG16-9
LRR1-51, LRR1-53, KS 90-1
LRS1-7, LRS 1-50, LRR1-50, LRR1-52
LRS 1-50, LRR1-50, LRR1-52
LRGT16-1, LRGT16-2, LRGT17-1
Gestra color touch screen NRR2-52, NRR2-53, URB50
Gestra NRR2-50, NRR 2-51
NRS 2-50, ประเทศไทย นำเข้า NRS 2-51, NRR 2-50, NRR 2-51, NRR 2-52, NRR 2-53
NRS 2-50, NRS 2-51, NRR 2-50, NRR 2-51, จำหน่าย ราคาถูกNRR 2-52, NRR 2-53
Gestra NRG16-50, NRG17-50, NRG19-50, NRG111-50 PN40/63/160/320
Gestra NRG16-51, NRG17-51, NRG19-51, NRG111-51 PN40/63/160/320
NRS 1-52, NRS1-53, NRS1-54, NRS1-55
Gestra BA46, BA47, BAE46, BAE47
Gestra BAE36, BAE36-1, BAE36-3, BAE28, BAE29, BAE210, BAE211, BAE39
Gestra BA28, BA29, BA210, BA211
Gestra PA46, PA47, MPA46, MPA47 PN40/PN63 CL600
Gestra PA110, MPA110 PN250/CL1500

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